If you could go back in time and meet the "younger you", what tips or warnings would you give to yourself?
In my case, I'd tell to myself to be more of a social person like I am today and try harder with school.
EDIT: Oh and also, I would inform myself about the major events that took place, like 11 september or the more recent Japan earthquake. Then I'd make sure that the past me makes this info public and when I'm back in present I am famous and called Bosstradamus.