As advised by "Popular Mechanics"

 

1. Patch a radiator hose

2. Protect your computer

3. Rescue a boater who has capsized

4. Frame a wall

5. Retouch digital photos

6. Back up a trailer

7. Build a campfire

8. Fix a dead outlet

9. Navigate with a map and compass

10. Use a torque wrench

11. Sharpen a knife

12. Perform CPR

13. Fillet a fish

14. Manoeuvre a car out of a skid

15. Get a car unstuck

16. Back up data

17. Paint a room

18. Mix concrete

19. Clean a bolt-action rifle

20. Change oil and filter

21. Hook up an HDTV

22. Bleed brakes

23. Paddle a canoe

24. Fix a bike flat

25. Extend your wireless network