Another rule, 2 is 1 and 1 is none. In other words, You need a back up in most things, but especially in Combustion (one of your 5 C's). Which pertains to fire making. Sure the knowledge of how to make fire with 2 sticks or with rocks is a good thing, but nothin' beats that good ol' Bic lighter. In an Emergency situation, You need it fast. Most primitive means are not the fastest for most people. As you must have the perfect tinders and kindling on hand and ready to go. Hard to beat that instant flame. So even if you don't smoke..Carry a bic lighter or two with you. Besides the comfort and warmth we get from having a fire, it is also a means of purifying your water. Not to mention smoke keeps the bugs and the fire concerns most animals that might other wise just walk into your camp. Also fire is a source of signaling if you're lost and wanting to be found. I always carry a lighter, I keep a ferro rod and a striker in my hat band, and wallet type magnifying lens.