Two of the most important tools in outdoor survival is a good knife and a fire starter. The fire starter of coarse helps in getting a fire going. It helps of coarse having fire building knowledge and experience. The knife is instrumental in helping to prepare your tender, cut pieces of wood for fire and shelter, and tool making in general. With a knife, fire starting material, and some knowledge you can build a fire, shelter, and fashion the other tools you need in the field. Also these pieces of gear do not take up much room.