Flip over a book on target’s desk.
Point flaws out to perfectionists.
Always steal the whiteboard markers.
Change the default printer on a target’s computer to one in a public space.
Add sand to keyboards.
Unplug the telephones.
Where possible, change light bulb colours.
Pour tuna water on a carpeted area near a heating vent.
Bring in free bran muffins with chocolate chip topping and dried fruit inside.