iPhone (1st gen, 10% battery life left)
I am a sheep. But, at least I am a sheep who bought my phone in 30 seconds on a drunken impulse the night they came out, instead of waiting in line like a dork.

And I constantly forget to charge it before I go to sleep at night.

a giant wad of keys
Because I haven't yet decided to chuck them into the the pacific ocean, and bike into the hills, fleeing all my attachments and responsibilties.

...although I would still need the key to my U-lock if I did that. So, why bother.

47 Uniball pens
I steal them from work.

$250 in cash (please don't mug me on my way to work)
I belong to a lovable credit union with only 2 native cash machines in the whole city, so I make my ATM visits count. I try to use my debit card for everything and wish I could just get the chip implanted already so I didn't have to carry cash at all and could transmit a complete real-time transaction stream to Mint.

A Moleskin, a sketchbook, and a pad of grid paper
I am one of those can't-just-use-one-notebook-at-a-time people.

ZipCard
Owning a car in San Francisco is a PITA. I love car sharing.

ZipCar is a miracle of service design, except when the gas card mysteriously stops working or my phone runs out of juice, then it's hell.

An extra pair of contact lenses
I have 20/10,0000 vision.

Business cards
Always Be Closing!