gatorade or water and something to snack on. you will get really thirsty especially if its sunny and warm out.
Oh yeah, forgot about that...tire pressure gauge
:+1: I was at Mid-Ohio last year, and a GTI did not torque his wheels down properly, and one of his wheels came off half way down the main straight. He managed to pull off the track, but then to add insult to injury, he proceeded to get out of the car while the track was still hot and look around his car :duh:. Entire session was red flagged.lug nut socket w/torque wrench to above