Drink tons of water, eat a hearty meal, maybe some ibuprofen if you feel it is necessary, get a good sleep, and most importantly MOVE AROUND the next day! I can't tell you how many times I woke up feeling like shit from drinking and then I just went outside, walked around a bit, rode my bike, did some pushups, etc. and I would feel MUCH BETTER. If you lay around all day the shitty feeling of a hangover will stick with you!