Uh... my monitor, my tower, my wireless keyboard and mouse, a stack of DVD-Rs and several stacks of DVD-RWs, a cup with a bunch of pens and pencils, my PC tablet pen, two crappy USB speakers, a TI-89 Titanium calculator, a camera, CD rack (contains all my hentai movies backed up), my external hard drive. two memory sticks, battery charger, stapler, white out tape, glue, paper clip dispenser, TY Millennium Bear, PC gamepad, The Lord of the Rings Extended set, a handful of books and notepads, faux plant, a coaster, a basket (where I keep my dry erase markers), a jar full of loose change...
Then inside my one drawer is... my diary, some old pictures, my computer journal (where I keep passwords and other important information), my high school diploma (just to keep it out of the way), and a spare gamepad.
I think that covers everything. :P