What is it? Water is that cool refreshing beverage that comprises 69 percent of men's bodies and 55 percent of women's.

How does it help? It prevents the dehydration that accompanies most hangovers.

How much? Plenty of it just before you go to sleep after a long night of drinking. Drink some more when you're in pain to help with the dehydration.

Don't you already know this? Yeah, but you always forget while you're sacrificing bodily fluids you never knew you had at the porcelain altar.