Sometimes it's amazing how much you can learn just from watching your friends. It's not that you learn something so obscure - most things are rather obvious. But when I really feel that people I know are behaving in admirable ways, it makes me feel good: about them and about good habits I am picking up from them.
I think in general, it is good to surround yourself with people who help you become a better you. They don't even have to know that's what they're doing, and they don't even have to be trying.
On the flip side, sometimes you can learn how not to behave from observing people behaving incorrectly.
I know this is all super obvious, but I was just thinking about it tonight. Well, I've thought about it before, but I decided to write about it tonight, anyway. Sometimes I feel like I'm becoming a richer person by surrounding myself with good people, or just by encountering them during my day, even if I don't actually know them for longer than five minutes. I like soaking it all up. And I like deciding not to behave in certain ways. All this makes me feel like I'm learning to know myself better. :) (A bit late, huh? I'm already 23.)