Sitting in Michael's Lap
Yeah, what Ali said -- however, if you happen to think of it the night before, drinking a good 3 to 4 glasses of non-alcoholic beverage (water is best, but yuck) BEFORE you pass out helps alleviate both the dehydration and the headache and body aches associated with it.
Ali my dear, know that I adore you, but milk is not in any way a base (this is a very common misconception)... it is actually slightly acidic, and helps the pH in your stomach only by diluting the stronger acid with weaker acid (in short, water would do a better job as far as pH goes). It does, however, have a good amount of solid in it as liquids go (it is a suspension, after all), and therefore acts similar to food in absorbing alcohol and allowing you to digest it more slowly. If you're looking for an antacid, you could do the baking soda thing (it's actually about 3X as effective as the antacids you buy OTC), but why choke down that nasty stuff when there's Tums?
Caffeine before you pass out might help too, as it speeds your metabolism and allows you to un-alcohol yourself faster, but it is also a diuretic and will make the dehydration worse.