and boiled p-nuts. If you drink one beer every two or three holes you dont give yourself a chance to dehydrate. Keep replinishing yourself with cold beer and your good to go. P-nuts are the snack of choice. They dehydrate too, so add another beer or two to the stock.
I just bring water with me. I don't like to snack while I play, so I try to avoid the little cart that goes around with snacks and drinks on my course.
I leave my drinking of beers until after the game is done. Some of the people I play with drink while golfing and I haven't come across one yet who has an improved game while they're indulging. Maybe they have more fun, but I usually beat them in score if they're drinking. I catch up in the clubhouse.