Carry Duct Tape Minus the Bulky Roll Duct tape can be a lifesaver. But carrying an entire roll takes up valuable space inside a backpack—and you probably won’t need that much tape. Instead, I wrap a couple feet around a Bic lighter, so I always have a short supply inside my pocket. If you need more, you can also wrap some around a Nalgene bottle. —Ben Wagner, Bozeman, Mont.
A pencil sharpener might not seem like something you should keep in your survival kit, but it's actually quite useful. The paper-thin shavings that you can make catch fire easily and make great tinder.