There are literally hundreds of uses for a length of paracord, and when you're out in the wilderness, it never hurts to be prepared. Even if you're just off for a gentle ramble, you never know when a good length of rope's going to come in handy! Here's a great little Instructable on making a paracord bracelet so that you're ready for whatever nature throws at you.
It's super light and easy to carry so won't weigh you down, and as you'll be wearing round your wrist there's no way you can lose it!
Check it out here.