I've got my old school bag for the bulk stuff, headset bag for the flight items, which includes:
whizz wheel
Arrow pilot's notes
sunglasses
pocket Maglite with red filter
square of notepaper with aero entry speeds and power settings
camera and two spare films
old Airport ID name tag from University days
headset
yuck! I didn't know I had food, old muesli bar half eaten
a spare earseal
some spare earseal gel from the one I split trying to put it back on
That's all