It needs salt! Alcohol not only deprives the body of water, but also of important minerals. That's why you'd rather bet on two shots of Tequila Silver than one shot of vodka. (Long term studies are not known)
A very wise man once said: "leigheas na póite a hól arís!" (Irish proverb: "the best cure for a hangover is to keep on drinking")
Salty, fatty food (e.g. Döner Stern)
Double Beer
Celebrate until 8:15 am and then straight to class. If you can do that, you can do anything!
Sports! Sweat it out or get high some other way. Either way, it'll make you feel better.
"I see double." You have two eyes, if you keep one closed you will most likely see only simple.
"My bed turns... Help!?" It may sound stupid, but it is a very simple psychological trick: get your foot out and brake.
"How many beers have I had?!" download the "Beer with me" app. This app won't help you to drink less, but at least your friends know where to come to count the beers with you.