Should've Joined a Frat
Attention high school men: if you end up going to a college with a dominant Greek presence (most large state schools in the south), join a frat. Not joining a frat is my one regret of college. Not sure if it's just my school, but 95% of the hot girls at my campus are in sororities. As ridiculous as that sounds, I'm not even exaggerating. Not only are they hotter, but they're also easier because it's part of their culture.
Of course if you already have an awesome group of friends, then there's no need to bother joining a frat. But if you don't have a solid social network that you're content with after your first semester (aka your roommates are antisocial losers and you're not in any clubs or anything), then do it. After freshman year, you'll be too busy and won't have the time to pledge.
Also, if you go to a school with a high male/female ratio and/or you're in a major where finding a bangable girl is rarer than spotting an ultra-rare pokemon (eg. math, engineering), then this advice goes double for you. There's no reason to deprive yourself of the easiest pussy you'll ever get (especially once you become a senior).
That is all.