While the only thing you can do to completely prevent hangovers is to not drink, there are some measures you can take to make your hangover as minimal as possible.

Drinking water is the most important part of preventing hangovers. Make sure you drink plenty of water before and after you drink. While you are drinking, try alternating alcoholic drinks with either water or a fruit juice.

Always eat something before you plan on drinking. Try not to have anything too fatty or greasy, but instead, eat something that is high in protein and carbs. If you can, also eat something after you are done drinking and make sure to drink plenty of water along with your meal.

Don’t go to bed immediately after you are finished drinking. Your metabolism slows down when you are asleep, so being awake will help to process the alcohol that is in your body.

Try to limit yourself to 1 drink an hour and also, don’t mix types of liquor (i.e. don’t drink beer, then wine, then a mixed drink), and avoid dark colored liquors (whiskey, red wine, dark rum, etc.). Also, try to take sips of your drink instead of big gulps. You want to give your body the best chance of processing the alcohol.

Not drinking really is the only way to completely prevent hangovers, if you follow the tips listed above, your hangover should be pretty minimal.