The most important survival tool that you can carry into the wilderness fits neatly between your ears. Knowledge, experience, and a little common sense will serve you better than any amount of equipment that you could possibly haul into the outback. Year after year reports surface about some lost hiker or skier that died of hyperthermia even though they had a pack containing shelter, a sleeping bag, and dry clothing. Survival gear without the knowledge of how to use it properly will do nothing for you.