I'm going to check my store the night before at 6pm (close), and depending on if anyone is there stay, or come back at 10pm. I might just camp out in the car for the hell of it. I'm going to bring the following:
A couple of fiberfill pillows, a couple of down pillows
A comforter
A comfy pair of slippers
A change of clothes
Kleenex
First Aid kit (you never know! people could get crazy!)
A cooler with beer, pop, diet pop, gatorade, and waters (enough to offer some to any iPhone-waiting new friends)
Chips, salsa, pretzels, fresh fruit, beef jerky, popped popcorn, some candy, etc
A book or two to read, some magazines
iPod (duh) and iPod speakers
Maybe borrow a friend's laptop to see if there's WiFi accessible or at least watch a DVD or something
Collapsible chair
Sunscreen
Ballcap
Mouthwash
Deodorant
A board game or two (maybe Scrabble and Risk! I don't know!)
Wallet + money (I'm going to a store in a big shopping center, so I'll have plenty to do if I end up not being in line or get tired and give up!)
That is, if I have the guts. I'm afraid camping out might be dumb since it's not on sale until 6pm.