In this tutorial, we learn how to prevent a hangover while out drinking. We all know that water is the best way to hydrate and we should drink a lot of it after a night of partying. But, a great way to prevent a hangover WHILE you're out partying, is to drink water while you are at the bar. This doesn't mean mixing water in your drink, it means drinking a glass of water after each cocktail you have. Not only will this prevent a hangover the next morning, it will hydrate you and make you feel better!