the better part of me

Bottled water, avoid soda it just gives you extra calories you don't need and hypes you up on sugar which will crash at somepoint. You don't want to be on a sugar crash while driving.
Take fruits and veggies to snack on (eat by the time you get to the border or pick up once you pass through the border) and some trail mix.

Above all else make absolutly sure you have the cd's or tapes you like with you in the car. Not the songs you're going to do at AN because then you're attention will be on that and singing it and whatnot but instead the stuff you like and find really fun to listen to.