Cure for hangover? Best cure is not drinking so much :)

The hangover is your body telling you you did something not entirely healthy. You might want to listen to it.

But if you must know: Drink water, that night, before going to bed. A good amount. Drink more water the morning after. A lot of your hangover is dehydration. Have a rich breakfast if you can eat it, or electrolytes (pedialyte etc) if you can't stomach the idea of eating.

But also, realize you've overdone it and learn something for the next time.