── Rule 0: There Are Only 10 Rules (And This Isn't One of Them) ──
Before we get to the actual rules — all ten of them, numbered and everything, in a format that would make a management consultant weep with joy — let me tell you why I'm writing this. I've been investing for a couple of decades now. Not the theory kind of investing. The real kind. The kind where you lose money sometimes. Where you make stupid decisions and then have to live with them. Where you panic-sell in 2008 and then watch the market recover without you and feel like an absolute lemon. The kind where you learn things the hard way — not because you're stupid, but because nobody sat you down and explained this stuff in plain English when you were 25.
These 10 rules are what I'd tell my 25-year-old self over a pint. They're not complicated. They're not clever. They're not going to make anyone rich overnight. But they work. They've worked for me. They've worked for people much smarter than me. And they'll work for pretty much anyone who follows them consistently over a long enough period. So here they are. Ten rules. No spreadsheet required.
── Rule 1: Buy Broad, Low-Cost Index Funds ──
This is rule number one for a reason. If you only remember one thing from this entire post — from this entire website, actually — make it this: buy a broad, low-cost index fund and own the world. One fund. That's it. VWRP — the Vanguard FTSE All-World UCITS ETF — owns 3,700+ companies across nearly 50 countries. Cost: 0.22% a year. That's £22 for every £10,000 invested. VUAG — the Vanguard S&P 500 UCITS ETF — owns 500 of America's largest companies. Cost: 0.07%. Seven quid per £10,000.
The alternative — the thing the financial industry wants you to do — is buy actively managed funds that charge 0.75%, 1%, 1.5% a year. Funds where a highly-paid fund manager tries to pick the 'right' stocks and usually fails. The SPIVA scorecard shows that over 15 years, 88-92% of active fund managers underperform a simple index fund. Not 50%. Not 'sometimes.' 88-92%. And the ones that do beat the market this year are almost never the same ones that beat it last year. You're paying a premium for the privilege of underperformance. Stop it. Buy the index. Own the market. Pay as little as possible. Move on to Rule 2.
── Rule 2: Automate Everything and Get Out of Your Own Way ──
You are the weakest link in your own financial chain. I don't mean that as an insult — I mean it as a statement of fact about human psychology. Your brain was not designed for consistent, unemotional, long-term investing. Your brain was designed for surviving on the savannah, where 'eat the berry now' was generally a better strategy than 'save the berry for compound growth over 30 years.' Your brain wants dopamine now. It panics when things go down. It gets overconfident when things go up. It's a wonderful, messy, emotional thing — and it's absolutely terrible at making rational investing decisions day after day, year after year.
Automation sidesteps all of that. Set up a monthly direct debit from your current account to your Stocks and Shares ISA. Set up an auto-invest to buy your chosen ETF every month. Set up salary sacrifice pension contributions through your employer. Set up a standing order to your SIPP. Do it once. Then delete the apps from your phone and get on with your life. The money leaves your account before you can spend it. The investments happen before you can second-guess them. Your brain never gets a chance to sabotage you because you never have to make a decision. Automation is not about being lazy. It's about being smart enough to know that you're not as rational as you think you are.
── Rule 3: Ignore Financial News Completely ──
This one took me far too long to learn. For years I started every morning with financial news. CNBC. Bloomberg. Market commentary. Earnings reports. Analyst upgrades and downgrades. 'Why the market went up today' articles followed by 'Why the market went down today' articles about literally the same day. I consumed all of it. I thought it made me informed. In reality, it made me anxious, reactive, and poorer.
The business model of financial news is not to make you a better investor. It's to keep you watching. Fear and greed keep eyeballs on screens. 'Everything is fine, keep doing what you're doing' does not. So the news manufactures urgency where none exists. Every minor market move is a crisis or a miracle. Every quarterly earnings report is BREAKING NEWS. Every pundit has a prediction, and almost none of those predictions are worth the airtime they're printed on. The research is clear: consuming more financial news leads to more trading, worse timing, and lower returns. The Fidelity study found their best-performing accounts belonged to people who were dead or had forgotten their login details. Be more like them. Check the news if you want to know what's happening in the world. But don't confuse it with investing wisdom. It isn't.
── Rule 4: Never Sell in a Panic ──
Markets crash. It's not a matter of if — it's a matter of when. 1987. 2000. 2008. 2020. 2022. Every 6-7 years on average, the market drops 20% or more. And every single time — every time — it has recovered and gone on to new highs. Not always quickly. Sometimes it takes years. But the direction of global capitalism over any meaningful period has been up and to the right, and betting against that has been the most expensive trade in history.
I learned this rule the hard way in 2008. I panicked. I sold near the bottom. I sat in cash while the market recovered without me. If I had done absolutely nothing — if I had just kept buying, kept holding, kept my hands off the steering wheel — I would be significantly better off today. That mistake cost me more than any bad stock pick, any high fee, any market downturn. It was entirely self-inflicted. Don't make my mistake. When the next crash comes — and it will come — do nothing. Better yet, keep buying. The people who bought through 2008 and 2009 are sitting on very nice returns today. The people who sold are still waiting for the right moment to get back in. The right moment never arrives. Just stay invested. It's the hardest simple rule in investing, and it's also the most important.
── Rule 5: Buy Less Crap and Invest the Difference ──
This is the one that gave the website its name, so you'd hope I believe in it. The formula is absurdly simple: stop buying things you don't need, take the money you would have spent on those things, invest it in a broad low-cost index fund, and let compounding do the rest. That's it. That's the whole philosophy. It's not about deprivation. It's not about living on baked beans in a cold flat. It's about being intentional with your money. It's about asking yourself, before every purchase: 'Will this actually make my life better, or am I just bored?' It's about redirecting money from meaningless consumption to meaningful investment.
The maths is almost unfair. £100 a month redirected from 'stuff I won't remember buying' into a global ETF could — at historical average returns, which are not guaranteed, all the caveats — become roughly £122,000 over 30 years. That's a lot of future freedom for the price of a few takeaways and impulse purchases. The stuff you don't buy today doesn't make you poorer. It makes future-you richer. Every pound not spent on crap is a pound that can go to work building your freedom. Invest the difference. Let time do the rest.
── Rule 6: Check Your Portfolio Four Times a Year, Not Four Times a Day ──
Markets go down on roughly 47% of all trading days. Check daily and you'll see a loss almost half the time. Your loss-averse brain — the same brain that feels losses about twice as intensely as gains — will process that as 'something is wrong' and start agitating for you to do something. Sell. Move to cash. Wait for things to calm down. All terrible ideas.
The solution is simple: stop looking. I check my portfolio four times a year — once a quarter, on roughly the same dates. That's it. Four times a year is enough to see if anything has drifted dramatically out of alignment. It's enough to rebalance if needed (though with my simple ETF portfolio, rebalancing is almost never needed). It's not enough to panic. The quarterly check-in is the single best behavioural investing tool I've ever used. It replaced my old habit of checking six times a day and making myself miserable. Delete the app from your phone. Set calendar reminders for four dates a year — I use roughly mid-January, mid-April, mid-July, and mid-October. Look at your portfolio on those dates. The other 361 days, leave it alone. Your returns will thank you.
── Rule 7: Keep It Simple — If Your Strategy Needs a Flowchart, It's Too Complicated ──
The financial industry has a vested interest in making investing seem complicated. Complicated justifies fees. Complicated justifies 'advisors.' Complicated makes you feel like you need help from people with expensive suits and framed certificates on the wall. But here's the truth: simple investing works. Simple investing actually works BETTER than complicated investing, because it's easier to stick with. A two-fund portfolio — one global equity ETF, maybe one bond ETF if you're older and want less volatility — is all most people need. Not five funds. Not ten. Not a 'bespoke multi-asset tactical allocation strategy.' Two. Maybe three if you're feeling fancy.
I own VWRP and VUAG as my core holdings. I've got some individual shares as satellite positions because I enjoy it — but if I'm honest, they're entertainment, not strategy. The strategy is the boring index funds. They do the heavy lifting. Everything else is window dressing. If you're new to investing, ignore the window dressing. Buy one global ETF. Set up a monthly direct debit. Done. Your strategy fits on a Post-it note. That's a feature, not a bug.
── Rule 8: Time in the Market Beats Timing the Market ──
I've written about this so many times my keyboard is probably tired of typing it. But it's true. It's always true. Over any meaningful period — 10 years, 20 years, 30 years — the investor who bought regularly, held through the downturns, and let compounding do its work has almost always done better than the investor who tried to dance in and out. Always.
If you'd invested only at S&P 500 all-time highs over the last 50 years — literally picking the worst possible days to invest — you'd still have done remarkably well. Because the market is at all-time highs more often than people realise. Because the long-term trend is up. Because the 'perfect entry point' you're waiting for might never arrive, and while you're waiting, the market has gone up another 15% and you've missed it. Stop waiting. The right time to invest is whenever you have the money. Today. Monday morning. As soon as the ISA transfer clears. The best day was 20 years ago. The second best day is now. Time in, not timing. Four words that are worth more than a thousand analyst reports.
── Rule 9: Know Your 'Enough' Number and Stop When You Hit It ──
The wealthiest person isn't the one with the most money. It's the one who knows exactly how much they need and stops running when they get there. Your 'enough' number is the amount of money you need invested to fund your actual lifestyle — not someone else's lifestyle, not the lifestyle Instagram tells you to want — with a reasonable buffer. Calculate it. Write it down. And when you hit it, stop. Stop grinding. Stop worrying. Stop chasing more for the sake of more.
The 4% rule gives you a rough starting point: multiply your annual spending by 25. If you need £25,000 a year from investments, you need roughly £625,000. It's a guideline, not a guarantee — but it's a useful one. Knowing your number changes everything. It transforms investing from 'I hope I have enough' to 'I'm on track to have enough by roughly this date.' It gives you permission to spend money on things that actually make you happy, because you know the investing side is covered. And it stops you from becoming the richest person in the graveyard — the person who died with millions and a lifetime of 'one day' never lived. Enough. It's the most important word in personal finance.
── Rule 10: Enjoy Your Life While Your Money Works ──
This is the rule that ties everything together. The whole point of investing — the reason we do any of this — is to live a good life. Not to die with the biggest spreadsheet. Not to have the most impressive compound growth chart. Not to win some imaginary competition against people you've never met. To live well. To have options. To not worry about money. To spend time with people you love doing things that matter to you.
Investing is not the point. Investing is the tool that lets you get to the point. The point is walking your dog on a Tuesday morning because you don't have to be anywhere. The point is saying yes to a holiday without checking your bank balance first. The point is knowing that if the boiler breaks, it's annoying but not catastrophic. The point is freedom. So automate your investing, ignore the news, check quarterly, and then go live your life. The money will be fine. The compounding will happen in the background. And one day you'll look at your portfolio and think: 'Blimey. That's enough. I did it.' That's the goal. That's the whole goal.
Ten rules. None of them complicated. None of them require a finance degree or a Bloomberg terminal or the ability to predict what the market will do next month. Buy broad. Automate. Ignore the news. Never panic-sell. Buy less crap. Check quarterly. Keep it simple. Time in, not timing. Know your enough. Enjoy your life. That's it. That's what I've learned. That's what I'd tell my 25-year-old self. And that's what I'm telling you — for whatever it's worth, from a 66-year-old who learned most of it the hard way.
As always, nothing on this site is financial advice. I'm a 66-year-old UK investor sharing what I do and what I've learned. All investments carry risk — the value of your investments can go down as well as up, and you may get back less than you put in. Past performance doesn't guarantee future results. The ETFs, platforms, and strategies I mention are what I personally use — they may not be suitable for you. The compounding examples use illustrative figures at hypothetical returns for educational purposes only. Actual returns will vary and could be negative. Do your own research, understand what you're buying, and never invest money you can't afford to lose. If you're unsure about anything, speak to a qualified financial adviser.