I've learned that regardless of how much you know, you've only got about one scintillionth of everything covered. I've also learned this keeps life fascinating if you approach it with the open mind of a one-year-old.
I have learned that that applies to everything but food. Don't eat your veggies first, you might get full sooner than expected and not have room for the good stuff.
I've learned that if you have a band and you don't want your music illegally downloaded you should give yourself a generic name like Cold or The Mission.
I have learned that you don't have to post in a topic just because it's available. I've also learned eating Doritos isn't healthy but it doesn't stop me from doing either.