I can't live without my Pilot G-2 0.7. I go through a pack of 10 in about a month.

Post-Its. I have a PDA that organizes my schedule and life very well, but I still find that Post-Its are more effective. My desk and office are covered in them, and once a task is completed, the Post-It comes off and goes into the trash.

The paper shredder. Sometimes I shred paper so that I don't have to throw it in the trash. I empty my own trash, but someone else empties the shred bag.

Jumbo paper clips. I hate the regular sized ones.

Paper cutter. I still can't cut straight with scissors.