1. Revenge on a dirty roommate - using a hairdryer blow flour or powder under their door to give everything an awesome white coat...

2. Revenge on a neighbor - write a nasty message on your target's lawn in weed killer, they'll never get rid of the bald patches...

3. Revenge on anyone who doesn't live with you - put gelatin down your target's toilet, in a few days it'll get solid...

4. When your roommate goes away, water his/her carpet and sow mustard and cress seeds for a lush shag pile...

5. Revenge on a neighbor - replace weed killer with plant food - they'll curse their green fingers...

6. Float unwrapped chocolate bars and toilet paper in your neighbor's pool...

7. Get as many alarm clocks as possible, set them for different times throughout the night and hide them on your roommate's room...

8. Fill your coworker's umbrella or coat hood with hole-punch waster, or even better four for a sudden blizzard...

9. Take your friend's bike, get a ladder and raise it over a lamppost so that it passes through the whole in the middle of the bike frame. Hide and witness their frustration...

10. Take your boyfriend's favorite clubbing shirt and use an ultraviolet pen and write what's on your mind, under any black light your message will appear...

11. Revenge on golfers - put dog crap in golf holes...

12. Make up elaborate flyers for a wild party at your enemy's home and wait for the guests to arrive...

13. Place a singles ad with your ex's phone number in newspapers and websites...

14. Subscribe your enemy to every form of junk mail you can lay your hands on, the more embarrassing the better...

15. Subscribe your ex to all sorts of weird sex magazines but send them to his neighbor's...