^ find a pine tree stump or similar tree stump that produces pitch (sap). Its best if the stump is somewhat weathered and rotted. I like to use an old ax and a crowbar to chop and rip the stump apart. The fatwood (basically pine resin soaked wood that is hard) will often be in the middle of the stump.

Its used by scraping off the dried wood/sap into fuzzie shavings and then igniting, It burns HOT and furious. Even in the wet.