I realize this is a broad question, but my life has changed drastically in the last few months, and I'm looking to experience more before I get too old. I know the usual answers like getting married, having kids, and so on.
I'm more interested in skills, hobbies, fields of education, practices, habits, and experiences that have shaped (for the better) the person you are today.
There was this federal program called WIN, Work INcentive. They hired me to help a dozen black rural females acquire literacy skills towards a GED. There were no textbooks or materials, there was no program. Just get in there and do it. So I was forced to be very creative.... (details too complicated)... anyway it was very challenging, absorbing, rewarding. Maybe not useful to you in your search, but at my age (70) and having done a lot of really unusual things, this one really stands out.