Hmm, someone mentioned char cloth above. I love that stuff. Good char cloth can hold a spark made from the spine of my knife against a hard rock. If I was really in a survival situation where I didn't have any tools with me, that would probibly be my big want. As long as it is dry it can catch the smallest spark. I try to carry a small tin of it and some natural fiber rope if I plan on going out into the woods, it works real nice for regular fires, while the cotton/p-jelly stays as a quick and easy back up for if it starts raining or something.