One of the most important tools for survival in an aviation accident is proper clothing. Be sure to wear comfortable shoes for an easy escape. Spiked heals or slippery soles can impede your ability to run if you need to. Open toed shoes can lead to foot injury. And remember that many airplane accidents involve fire, wearing long sleeves and pants to protect your skin will give you a better chance of escaping a downed plane unharmed.
Being aware of the landscape below your wings is critical for aviation survival. Pack extra water, hats, sunglasses, and sunscreen for flying over deserts. Machetes, bug repellent, or mosquito netting are necessities for the tropics. Snow goggles, sun screen, and warm clothing are important for cold climates.
You'll want to have some basic equipment for signaling rescuers. Whistles and three by five inch signaling mirrors are lightweight and ideal for survival situations. If you are piloting your own plane, be sure to know how many passengers there will be and pack first aid supplies accordingly. Bandages, antiseptic, and even pain killers are important components of a first aid kit.
Since you never know how long you'll be in a survival situation, prepare for the worst. Bring fire-starting tools, such as flint and waterproof matches. Knives, saws, tarps, and leather gloves can be useful in building a shelter. Fishing gear, in the right environment, might help keep you alive and provide entertainment. After all, keeping your spirits up is critical for survival.
According to the FAA, one of the best tools of survival is your mind. Being prepared for whatever might happen and being mentally ready for the "just in case" scenario will put you one step ahead. Arming yourself with survival courses and books is important. Equally important is the realization that you can't plan for everything, you'll need to be flexible, and be ready to use your imagination in order to survive a tough environment after a plane accident.