Waxed cotton disks are great. So are petroleum jelly soaked cotton balls or lint. Either way, they are candles in which the wax or jelly act as the fuel and the cotton or lint act as the wick.
The same thing can be done with jute twine and wax or a scrap of cotton with frayed edges and lip balm. Essentially anything that will act as a wick and any fuel you can apply to it.
Personally, I use the discs, the pj cotton balls. I also carry a stick candle remnant and trick birthday candles (if you have a lit candle, you have a fire - you just need to make it bigger). I use the candle to get a fire going, then extinguish it for reuse later. I live in the rain forest of the PNW, where getting fire going can take some practice and patience.
I always have a ferro rod and a lighter on me. I actually prefer the wheel striker (like what sparks for a Bic lighter) because it can be operated with one (either) hand in the event you are injured.