I have a small Pedros bag - $2 cash, 1 tube, 1 lever, 1 CO2 cartridge with small head unit, Crank Bros tool ( I can't remember the name-smallest one they make), copy of my insurance card, 1 gu packet (in case I forget to put one in my jersey), 4 baby aspirin ( I have a heart condition ), if a long trip an atm card if I need food or a cab back home
In my jersey, never forget a cell phone.