In the memo field of all your checks, write "for sexual favors."
Reply to everything someone says with "that's what you think."
Practice making fax and modem noises.
Highlight irrelevant information in scientific papers and "cc" them to your boss.
Signal that a conversation is over by clamping your hands over your ears and grimacing.
Disassemble your pen and "accidentally" flip the ink cartridge across the room.
Adjust the tint on your TV so that all the people are green, and insist to others that you "like it that way."
Staple pages in the middle of the page.
Repeat the following conversation a dozen times.
"DO YOU HEAR THAT?"
"What?"
"Never mind, it's gone now."
Ask people what gender they are.
Ask your co-workers mysterious questions and then scribble their answers in a notebook. Mutter something about "psychological profiles."