The two best pieces of advice I ever got were, in this order:
a) Hope for the best, prepare for the worst.
and
b) "Don't be scared to be attracted to girls". This one comment has shaped my view on sexuality....while I call myself gay because it's an easy way for people to pigeonhole me, and while I have never done anything more with a girl than kiss, it wouldn't bother me to have sex with one (assuming I'm attracted to her in the first place). I think people can restrict themselves way too much depending on what society tells them is right...