Masking tape (for numbering)
Cooler, with
  ice
  cokes
  water
  breakfast (or eat on the way)
  lunch (hearty lunch)
  lots of snacks

Drivers License
SCCA Membership card
Entry Fee
Helmet
At gas station:
  full tank, premium
  tires to 40PSI all around
  check all fluids
Clothes
  sunglasses
  hat
  sunblock
  cold-weather clothes
  rain gear

Folding Chair
Netepad/Pen
Toolbox, Jack, tire/jack blocks
Watch
Car-cards
Camera
Tarp
trash-bag
Event Flyer
Directions to event