Rent some TV show seasons, they're shorter than movies so easier to follow. Just go to blockbuster and you'll find at least one or two shows to rent.

As for snacks, I think it'd be a neat idea to get all, or most of what brian lists in Half-Baked for munchies.

Oh, and I might suggest you bring along another beverage in addition to water. If your drinking straight water the whole time, your gonna have to piss like a ma'fucker 'n that shit is going to suck, and make it harder to hotbox.