Acetaminophen + alcohol = vicious, liver-destroying poison. Don't take Tylenol when you've been drinking.
After a long night out on the town, if you are in any condition to do so, take two aspirin before bed. These will help decrease the severity of the hangover in the morning by inhibiting prostaglandins. (You know you don't want those prostaglandins
running around inside of your body like evil elves while you have the spins.) Then take two more in the morning with some breakfast. It'll decrease the severity of the morning headache and decrease the elf- or prostaglandin-related swelling.
If it's one of those mornings where the hair of the dog sounds as appetizing as actual canine fur, aspirin's your ticket to a productive day.