On a more serious note, I am an old hand at this (it's no secret that I like my beer lol!)
DO NOT drink coffee - the main thing you feel during a hangover is dehydration - that's what causes the headache. Coffee dehydrates you further, and what you need to do is rehydrate. Drink lots of water. Sometimes fizzy drinks can, for some reason I find, be a bit of a miracle cure - I usually find cold coke or sprite with lots of ice does the trick - but you need to drink a lot of fluids.
Also hangover prevention - eat before you start drinking, and when you get home drink at least a pint of water if you can do so without puking. If you wake up in the night (you're gonna if you drank a pint of water before going to bed lol) then have more water.
Take it from me, I'm a pro - although after Phil McCavity and SomeGuy's 'What the heck is going on' thread, I don't think anyone's gonna take me seriously any more
