[Aysedasi]

Good topic. Because we're reasonably mobile at the circuit, I don't need to carry as much around with me as others may do but I have

camera bag (plus the obvious - DSLR camera and lenses + video camera and all of the various photographic accoutrements....)

The camera bag and the pockets of my bodywarmer are also home to a number of other things -

sunhat (if not wearing it in the uninterrupted blazing sunshine of Le Mans 2009)
small torch
radio/mp3 player + headphones
various headache pills (paracetamol and ibuprofen + my really serious migraine jobs if all else fails....) and Bisodol tablets
small packet of tissues
sticking plasters (including a couple of blister plasters)
pen
small bottle of water

and spare glasses (thanks for the reminder Elaviel!)

and a Jack-in-a-Pack (if it looks lke rain - no chance) (thanks for the reminder GTfour!)