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.
Have multiple food deliveries scheduled for staff events.
Hang undergarments under staff members’ coats.
Pour a bottle of perfume or cologne of the opposite sex in the corner.
Add pepper to the coffee supply.
Add salt to the sugar.
Hide and/or steal the tissues.
Father’s Day Special
Have bizarre catalogues delivered.
Remove sticky notes from surfaces and re-adhere with super glue.