Commercial planes are better equipped than you ever can or will be.

http://www.flightsimaviation.com/data/FARS/part_121.html

Let me put it to you this way.

If your commercial jet goes down on takeoff, if you survive, and you can walk, then you'll get away and be treated quickly.

See this:
http://break.com/index/bangkok-plane-crash-survivor-footage.html

If you don't walk away, you're most likely dead.
Same goes for landing. We're not talking about small planes here, we're talking about big planes.

I can find no record of any survivors of a mid-air incident involving commercial jets.

The movie with Tom Hanks - the one where he's on a desert island for years and years - is fiction. The impact from a plane crashing into the ocean is more than enough to "de-glove" the body from the skeleton, and the idea of going from 300+ knots to zero in milliseconds - and surviving to eat crabs over a fire started with a fresnel lens is, at best, amusing and at worst, a delusional fantasy.

When I travel, I mail the stuff I might need - on the ground - to the hotel where I'm staying. If I check bags (rarely), I put the not allowed stuff in there, but I almost never check bags.