First, obligatory link to the sunscreen speech:
https://www.chicagotribune.com/columns/chi-schmich-sunscreen...Second, I'll throw some things out there, though, apart from what's already been said (like health and travel):
- Invest in therapy, if you haven't already. Learn your blind spots, your rackets, and your stories that hold you back.
- Make new friends with younger people, whether it's via mentorship or some other means. If you don't, you'll be an "out of touch boomer" before you know it.
Unlike my 20s, I feel like I navigated my 30s pretty well, so I don't have a lot of things I wish I had done/known that I didn't already. I think that's really the difference as you get older...you developer fewer new regrets.