I carry a bunch of stuff so let me list it in order of preferred use

Butane Torch lighter - this is one of those with the 1300 deg. flames capable of soldering with. Seems that the flame is also fairly windproof and the one I use has a largish tank so it doesn't run out too quick

Butane electronic ignition lighter - this one is unique in that it has a metal screen inside that gets hot enough to relight the flame even should the wind blow it out. This makes it effectively windproof. It was my fav. until I started using the torch. It has fuel capacity similar to a regular bic and is about the same size. It is also electronicly lit so I expect it to be water resistant. It has no seal to keep water out but it's design is fairly safe from being effected by the wet.

mini-bic - 'nuff said

book matches - light, easy to carry and replace, just downright convenient backup.

strike anywhere matches in match safe - better than book matches and even if they won't light they provide decent kindling.

spark-lite with tinder tabs - back-up to all back-ups hides in the altoids tin.