Spare tube, tire levers, mini-pump, topeak alien, ipod, a book or two, wool hat, sweater, sharpies/paintpens/ballpoints, journal, phone, kryptocable (sometimes). all in the old zo bag or new chrome bag.

and a u-lock in the back pocket.

edit : oh, and a roll of black e-tape and an almost-gone roll of black gaff tape.