Become a fan of h2g2
It has been said that the towel is the most useful thing in the universe. Well, then the second is of course the spoon. Unfortunetely it is also very underused. Most people only use it to eat with, but if they ever need to dig a hole, defend themselves, look into a mirror, barter with a guy that barters, or even put on a display of etiquet, a spoon will be most useful.