5. Magnifying Glass Method
You may not think of a magnifying glass as a survival kit must-have, but a lens can be extremely useful. Not only will it help you read fine print, it can help you see your way to a roaring, warm fire in just a few minutes.
Simply use the lens to focus sunlight onto your tinder, just as if you were burning your name into block of wood. Experiment to find the focal length of your lens, and then position it to focus the light into the smallest circle possible.
The downsides to this method are that it requires daylight to work. Dry, easy-to-light tinder is also very helpful.