+1 on making sure you're hydrated. I carry a 1-gallon bottle of water with me that I make sure to empty by the end of the day.

+1 on torque wrench and tire gauge as well. Make sure your wheel lugs are correctly torqued right before you go out for another session: don't torque them right after you get off the track because the wheel assembly is still hot and you may overtorque the bolts. But do check your tire pressures right after you get off the track.

I also bring a couple of the big plastic container boxes that you can find at many stores (BBB, LnT, OSH, etc.) to put all my stuff in. I buy the largest opaque ones that will fit in the front compartment, and I bring two of them one stacked in the other in transit. They're pretty good at keeping dust and rain out of your stuff.

Page 4 of the following PDF from the Golden Gate Chapter of the BMW CCA has a good list of things to bring:

http://www.ggcbmwcca.org/download/dr...Prep090106.pdf

Have fun, and hope you enjoy your first DE!

--Andre