1. This is the most important step, which is why it is number one-
As the plane is falling from the sky and crashing into the ground, DON'T die.
If you can't even be bothered to do that, then further advice is useless. You have to really be committed to the "not dying on impact" directive.
2. Fashion yourself a cool headband - this will keep sweat out of your eyes AND let other survivors know that you are SERIOUS about this survival stuff. SERIOUS..LY AWESOME... Especially if you make it out of a live animal.
3. Get a reasonable distance from the airplane until it is safe. There is nothing more tragic than making the commitment to live through smashing into the ground, only to find yourself sucked into a jet engine while staggering around in shock. Also, shrapnel from exploding planes is adverse to your objective of living.
4. Find shelter- If blankets and cushions are not available for a fort because the plane is a fiery deathtrap, dig a big hole. It will keep you warm (or cool) and you can always cover it with sticks and leaves when you are not using it, to trick people into falling in. Practical jokes always raise morale.
5. Look for fresh water- or quickly get used to the idea that you might be drinking your own distilled pee water soon to live. Beware other survivors who are fine with drinking urine, right off the bat.
6. Watch lots of episodes of LOST and read teen fiction like The Hunger Games Trilogy before any plane travel. This will make you aware of all of the experiences you are sure to encounter while navigating a survival situation. Shows such as Survivor Man and Man vs.Wild will do you no good.
7. Always wear a suit of snack foods under your clothes when traveling. While you CAN forage for edibles, that requires that you actually know what you are doing and don’t eat things that want to kill you. It is safer to just eat your clothes. A good mix of fruit rollups, corn chips, and jerky will keep you healthy until to you can be rescued. Chocolate is not suggested for these garments.
8. Be rescued.
VERY loosely adapted from the SAS Survival Handbook.