Go on adventures!
I think traveling, seeing the world, and getting to know different people is one of the most important things that anyone can do in life. It serves so many purposes that there's no point even trying to list them all -- it's good for the mind, that's for sure.
I grew up flying everywhere on the weekends in my dad's little 4-seat plane and then as soon as I had a car it was all about road trips across North America. This is my effort to catalogue some things I have photos of, so that I can look at things when I'm old and senile.