Some seasoned campers are partial to old-fashioned fatwood as a fire starter, and for good reason. Fatwood is the resinous remains of a dead pine tree. When it dies, either upright or fallen, the sap settles into the heartwood of the branches and trunk. As the tree roots, the sap hardens into resin-soaked wood that’s highly flammable and starts fires quickly and efficiently. Fatwood is super light and it’s easy to put a couple pieces in a zippered plastic baggie and stash them in your gear bag. It’s waterproof, eco-friendly and it’s available in large boxes so you can also use a few around the house.