Tonight on Mythbusters, they went over several ways of making fire in survival situations including starting a fire with a gun, the chocolate bar and soda can method, and by using ice as a magnifying lens. It was pretty interesting. It airs again on the Discovery Channel at 1:00 am.

I won't spoil it for you, but I will say it was a hoot watching them try to start fires with several well known methods such as the firebow and hand drill. Watching them, it seemed to me like they didn't do their homework before these particular attempts, but it will give you an idea, if you've never tried to do this before, how frustrating it can be.