Wallet of course, which contains everything i need financially or in terms of identification (ATM cards, VISA, cash, college ID card, any other ID cards, medicare card, etc etc).. and i usually carry my phone and keys on me as well.
It depends if I'm going to work or just shopping etc. so since I'm having to go to work every day here is what I carry out of the house everyday.
~ pen - left shirt pocket
~ blank check - right shirt pocket
~ pouch in left back pant pocket (money - Driver's license, SS Card, employee cards, gift card)
~ right back pant pocket PDA
~ Handbag with wallet, planner, digital camera, more pens, makeup, checkbook, mints, etc..
~ 2 cell phones (work & personal)
~ Laptop in carrying case on the right shoulder.
Keys sometimes, not usually. Although little things like my Mini-Maglite and Micra Leatherman would be useful, they get annoying and dont get enough use to warrant carrying them around. Don't like to have a lot of stuff on me.