I usually carry two styles, both home made.
First are vaseline soaked cotton balls. These get used most of the time. I have a few in a ziplock baggie in my pocket, few in the fire kit, few in the pack.
Second, I'll take a section of newspaper, and roll it really tightly. Its usually a few pages, so it turns into a long roll about as big around as the diameter of a quarter. I tie it every 2" or so with cotton string, and cut between the ties, giving me a dozen or so 2" rolls of newspaper tied with a string. I dunk those in melted wax from leftover candles. Let them dry, and done. They are waterproof. You can unroll a little or a lot of them to make them easier to light. The unrolled end burns quickly and takes a light well. The rolled end burns for quite a while. I'll unroll half, leave half rolled, and they will start just about anything I have needed lit.
I usually have one or two of these newspaper rolls in my pack and one in my pocket in case I can't get the fire lit with the cotton balls.
This is something I learned in Cub Scouts a lot of years ago, and I enjoy showing younger hunters how to make them. Sort of like reloading, it may not always be the quickest or cheapest, but it is the most fun.