What about one of those "last-long" candles? small to carry, lasts a while, but burners well on paper or wood and a few drops burn long enough to make the rest catch. (assuming your working with a wood stove or campfinre: pretty pointless on a gas stove...)

I guess not many carry a small magnifying glass but it could be used in right conditions.

While on a rafting trip in Kamchatka several years ago, in the midst of a steady rain, our Russian guide started a fire for tea by rubbing two sticks together. I was pretty amazed that he could do it, especially in the rain.

Keep hold of your old inner tubes. You still need a source of ignition, but rubber catches easily. Sectional strips of inner tube could also be used to tie or bungee stuff down at a push.