Get a roll of UL-181BX shiny duct tape rather than the cheap stuff. Well worth the $$$. Also, a couple of gallons of drinking water, a good reflective sun-shade, a couple of construction-grade trash bags, a piece of closed-cell foam large enough to protect your knees and feet from the 150°F payment should you have to kneel on it, a roll of Viva paper towels, a can of TuffStuff (hand cleaner in a pinch; also great to clean bugs off windshield), pair of mechanics gloves. Be sure you can loosen all your lug-nuts with the wrench in your car. Nothing worse than having a spare but no way to get the #$%^&! nuts off with a cheap wrench.
Originally Posted By: Pajamarama
Oh, and will have some duct tape. Can't believe no one mentioned that yet. :-p