Rule of thumb is to drink 1 8-ounce glass of water with every alcoholic drink so that your body does not get dehydrated and you do not wake up with the pounding headache. But, what fun is that. I usually resort to the stick-my-head-under-the-faucet-and-chug right before I go to bed, but I don't have a stomach big enough nor can I stand up long enough to make up for all those 8-ounce glasses I missed during the course of the night.