A collection of gear wouldn't be complete without loads of small things, so here are some that can always find a place...
Green EOS strap (because I like something a bit less conspicuous than the EOS DIGITAL with red)
PC sync cable
Looooong 3.5mm stereo cable (I use them for my homemade sync connectors)
Sandbags (for holding down lightstands, don't know exactly where to get those)
Film (Fuji's Superia is what I usually use)