In my pockets:
Wallet, keys (inc utili-knife key), HTC EVO, gerber pocket knife, leatherman skeletool (carbon fiber edition), antihistamine tablets (due to severe allergies).<p>In the bag:
MBP, power adaptor, 20' extension cable with several sockets at the end, belkin travel surge protector, spare battery (I have an old-gen MBP), beats-by-dre studio headphones in protective case, two pairs of v-moda bassfreq headphones, iPad, iPhone USB cable (for iPad), (paper) notebook + pen, DVI-to-VGA adaptor, epi-pen + antihistamine drugs, emergency Cliff bar for energy drops, business cards,.