It's all about limits. Freshman and Soph. year, I'd blackout relatively regularly. Obviously not the most flattering way to present yourself. By Jr. year, the key was to simply not buy more alcohol than you could drink. ie: instead of getting a case and splitting it with a buddy for a tailgate, get something less.
I don't know what it is about the way my brain works, but since I bought 15 beers I feel like I MUST drink all 15 beers or it's a waste.
However, when you get to the bar scene it's much trickier. I would simply suggest sticking with beer or if you hate beer than just to go with the watered down shots that you can get. Also, living near Aggieville, if I feel like I'm already too drunk and ready for bed or to get some late night food I can just walk the 5 minute walk to my apartment. Having a close out to leave the bars is also a major key, IMO.