Put a piece of paper in my door so I know when someones been in the room. I also tilt the door handle down around 10 degrees when I leave the room. When you shut the door, the handle revolves back into its original position -- but you can push the handle down. If the handle isn't in the original position, I know someone has been in my room, even if the paper is where I left it -- someone might have put it back. I can't remember where I got these ideas, but I've always taken this precautions.
I also put ridiculous amounts of pressure on all my joints, from the point when I wake up until around 9:00 P.M, where I no longer have the urge. I crack all my fingers mechanically constantly. I brace my jaw constantly, and lean my head forward so pressure is instilled on the bottom part of my neck. I push my wrists down to force pressure onto my brists, and constantly squeeze my lats together.