If I anticipated a hangover before I went to bed, I would down a handfull (three) of Advil or Motrin with a big glass of water. A greasy breakfast followed the next morning. And drink gatoraid type drinks. This handled most general purpose type hangovers. Except for teqilla (tekillya) or mescal. Never found anything that worked on those. Except more (~!)
So the question of the day is:
What is your ultimate hangover cure?