Hair Loss: Insert hair hair removal cream into your friend's bottle of conditioner.
Fake Winnings: type up vouchers explaining that your victim can claim their free pizza at the local restaurant. Or buy fake winning lottery tickets.
TV Out of Control: Use a secret clicker to control TVs, at home or in public places like the local bat
Fruit Surprise: Inject hot pepper sauce into random fruit, vegetables and cakes
Car Whistle Prank: you need a long thin potato about the diameter of an exhaust pipe. Drill a hole lengthways and rig a whistle into one end. Stuff the potatoe into the tailpipe.
Wet Sleepover: Once your victim is sleeping, get a bowl full of lukewarm water and stick their hand in it. This disrupts the brain signals and in the morning they will have a rude awakening when they find out that last night they wet the bed.
Eek: put itching powder onto the toilet paper
Umbrella: take an umbrella of the rack, fill it with small objects from around the office, and put it back where you found it.
Sewing: Sew up the holes in your victim's socks. First thing in the morning they'll still be half asleep as the try to work out what is going on.
Condemned: Condemn you neighbour's house with fake health board notices.