Make time to enjoy your life, it goes by in the blink of an eye. Spend too much time thinking about the future and not enough time thinking about the now can end up being stressful.

Be decisive, the hardest questions you will ask your self as you age are, what if I had? Be resolute in your decisions, even if they turn out badly. You decided to do something, don't leave your self room for those what if I had questions.

Be good to others while you are at it... ;) I know of many mortals who didn't, now I'm fine with their decisions, but lets just say they aren't.