We talk a lot about Hangover Helpers here on SE: Drinks, but it's often just an excuse to seek out deliciously greasy breakfast plates, awesome-hot Mexican fare, and a reason to check out a new brunch spot and then be lazy for the rest of the afternoon.
When we know we've overdone it a bit, we tend to pour ourselves a big pitcher of water and not let anyone go to sleep until the pitcher is empty. It usually works. But some folks swear by other solutions—potions like NoHo or Mercy (their offices are actually in the same building as SEHQ!)
Do you take magic vitamins before you go out for a hard-drinking evening? Or do you drink coconut water or Gatorade before bed? If you wake up with a headache, where do you turn?