There's this advise I recently read: find a hobby for your health, find one for your creativity and find one for your knowledge and intellectual development.
Well ... more or less :)
I see it as reading about various topics, drawing and taking drawing classed now and then)and try to do some sports from time to time.

The difference between your current you and you within five years is the books you've read and the people you've met ..
and other kinds of wisdom ;)