Best hangover cure: Stay drunk.
Yep. Power-slam four beers and your hangover is gone. Unfortunately, this usually leads to four more beers, another four after that and a hangover again the next morning.
Seriously though, the best hangover cure is a full shot of Nyquil. After about 20 minutes, you'll find yourself in a blissful, pain-free happyland. Just don't plan on leaving the sofa for the rest of the day.