I'm 55 and really have no big regrets. Do stuff you enjoy. Spend more time with friends and family. I've not started my own company, I've occasionally though

I'm 55 and really have no big regrets. Do stuff you enjoy. Spend more time with friends and family. I've not started my own company, I've occasionally thought about it, but I don't think it's my thing. I don't think going back 10 or 20 years with the knowledge I have would change my decision. You need to be a certain kind of person to enjoy starting your own company, the risks are large. Having the right partner can be a factor (a co-founder that complements your skills). Take care of your health, stay in good shape, not a lot of downside as far as I'm concerned. Sports or martial arts or something that gives you that + social aspects is IMO a good idea. On the financial side saving + investing makes a big difference. I would start investing earlier. I don't think it'd make a huge difference though for me. Learn how to play a musical instrument, learn more languages, learn how to dance, examples of things that can be fun and challenging. Believe in yourself and "just do it". You're capable of a lot more than you think you are. Career-wise try to be the best at what you do. Work on your people skills as well as your technical skills. Network and make and maintain connections and do great work and that combination will get you places. Also if your goal is to become lessay a CEO that requires a very different approach then becoming a principal engineer, or a CTO. You need to be pretty fixed on that target/driven, and have the right skills, to get there. Not for everyone. There are many different paths that can all work out. Find yours. Most of us are very fortunate to have the sort of options that many don't.