First of all, I'd want to take the following movie scripts with me:
Memento
Mullholland Drive
Identity
and go back to either 1993, because that was the year I did best in school, or 1997, assuming I had the knowledge that I do now. I would take a lot less shit, and there would be a lot more headbutting going on. That's for fucking sure.
Then I'd pass of those scripts as mine, and in clear concience because they hadn't been written yet. (I think)