Say "yes" more, try more things, try things at least 3 times before giving up.

Also, I had so many ideas that I didn't get around to trying until my 30s, and it was mostly because instead of just going for it, I would share them with others first, and get talked out of it for various fear-related reasons.

I would tell more people more things about what I've already done, and fewer people fewer things that I haven't done yet but am planning, unless they themselves were good at those things or involved in my plans.