I'm talking about life decisions that worked out perfectly and left you with no regrets. Here are mine:
Quitting Facebook - I quit using facebook about 2 years ago. It's a toxic platform that destroys your privacy, worsens your mental health, and endangers democracies. Much happier since I quit, and no regrets at all. Talking to friends and family face to face or through text is way better.
Quitting my old toxic, stressful job - I quit working at a top 500 software firm a while back and have been much happier ever since. There was little to no work/life balance, co-workers were extremely antagonistic, the work was amazingly both boring and stressful, and management didn't care about anything. Quit for another job that paid around the same with a much better culture. No regrets.
Reading books - Books have completely re-shaped my world view, and I would be much worse off without them. Here is my list:
"The Better Angels of Our Nature," "Enlightenment Now," and "Factfulness" by Steven Pinker (first two) and Hans Rosling (last). The world is improving overall, not getting worse like the media makes it seem. Reading the facts convinced me it is logical to be an optimist.
"Ultralearning" by Scott Young and "A Mind for Numbers" by Barbara Oakley. Two books that teach the science of efficient learning. These books helped me understand the best strategies for long-term knowledge retention. Every public school in the world should be teaching the concepts in these books.
"The Bogleheads' Guide to Investing," "The Millionaire Next Door," and "Your Money or your Life," by Taylor Larimor, Cotter Smithand, and Vicki Robin (in that order). As well as various FIRE blogs. These books helped me learn the basics of personal finance, investing, and early retirement. Previously I thought that working until you die was an unavoidable fact of life. Reading about FIRE and smart money management made me question that assumption, and freed me from the shackles of corporate nonsense.
I'm interested in hearing what other people have to say. Give me what you've got.
Getting in shape and having a regular exercise routine, for sure. All of the side effects from that are incredible... Stamina, confidence, clearer thinking. So great.
I started a morning journaling habit and committed to doing it for two weeks - about five years ago.
Most mornings I just jot down 3 quick random things I am thankful for.
Now when I look back over those journals I see evidence of big decisions they helped me make, new habits, all kinds of other ways it's affected me for the better.
I've also built up a nice little stock of letters to my kids this way, for them to enjoy after I'm gone.
My morning journalling is also five years old this year. My only regret is that I wish I'd done it sooner. Going back and reading what you did last year or the year before, can really show how much you've grown or what still needs improving.
Creating a budget. I’m naturally frugal so I did okay without a budget. Stayed out of debt, saved for retirement, etc. Making a budget took it up to completely new level. It added clarity into all of my personal finances. I plan and save more. I know exactly when to expect upcoming expenses and have emergency funds earmarked for unexpected. I have a much better understanding of how much I can contribute towards retirement while keeping a sufficient cash flow for my budget. A budget made everything more clear and reduced stress
Changing career paths in my 30s (less stress, more money), getting a divorce (not staying in an unhealthy relationship), having kids (gives me a lot of purpose), paying down my mortgage (financial freedom)
Keeping my reading habit throughout the past decade.
Choosing the "wise" path of Computer Science instead of Physics as my degree: I absolutely love math and physics but sadly in my country research and teaching are poorly financed and paid. I don't love CS but I enjoy it enough and also the pay is very good even for a fresh graduate.
Learning about finances and investing. I don't expect to FIRE but at least I think I'm on the good path
Stopping drinking alcohol, and getting in a regular exercise routine. I was never a huge drinker nor was I really overweight, but both changes made a massive difference.
John Bogle was the founder of Vanguard and was one of the key figures in promoting index funds and low cost investing. This book covers his investing philosophy in an easy to understand manner.
To tl;dr the book, buy 1 total market , 1 total bond, and 1 total international index fund. That gets you a weighted piece of everything. There is no picking winners, you are picking EVERYTHING.
This will give you an AVERAGE return every year with no need for you to do any trading. Why do you want average instead of the best? Because no one can predict what will be best, but 75% of all funds perform LESS THAN AVERAGE.
It greatly simplifies investing with results you can verify yourself, and it takes almost so the stress out of investing so you actually do it and stick with it, and the quantity of time your money spends invested without touching it is what gets you the positive return on investment.
The book is about 300 pages, so this is obviously simplified. If you'd like a longer but still quick explanation check out the Bogleheads forum wiki.