TMI Question - If you could go back and change something about your high school days what would it be?

Today's TMI question is if you could go back and change something about your high school days what would it be? The answer would be not much. I actually enjoyed high school. I had great friends and had decent grades. I suppose if there was one the academically, it would be trying to get out of Mr Stevens's calculus class instead of sticking with it. I didn't learn a single thing in his class and should've taken it with a different teacher. Also, I  suppose sleeping with more girls would've been good instead of being the complete geek that I was.