I think after 4 years of hard drinking (I had to do something while I was in college

) I hsould know the best remedies for a hang-over.
The advice mentioned earlier about drinking a lot of water just before you pass out is
very good advice. This rehydrates your body after all the alcohol wears off.
It is also good to eat something very greasy either during the night before you pass out (my drinking buddies and I always found a sober driver to take us to Taco Bell, and if not we'd walk through). If you can't eat the night of, then make sure you eat an extra-greasy breakfast at Denny's or such. I'm talkin' bacon, eggs, sausage, buscuits and gravy, etc.
DO NOT DRINK ANY CITRUS, LIKE ORANGE JUICE, or anything with caffiene in it. This will only upset your stomach more.
A recent discovery to the recovering college alcoholics can be found in the pediatric isle of your grocery store. It's Called PediaLyte, and is for sick infants to rehydrate them. I've never used this tactic, but it makes perfect sense.