Do you know where your towel is?

Before you take this as entirely a joke, remember that a good towel is a fine piece of multi-function kit. It can pad help keep you warm, shade you from the brutal sun, give you a nice place to lay down in a world full of sand spurs, keep the blood in, be twisted up and used to torment siblings or eliminate biting flies. And when your done, it will dry you off.

http://www.towelday.org/

Knowing where your towel is preparedness.

Douglas Adams got it right.