Evo said:
If it's evacuating an airplane, it's whoever shoves their way past the others.
It's whoever plans better before the accident occurs.
1) Pick a http://www.popularmechanics.com/science/air_space/4219452.html . Back in the days of smoking on airplanes, it always seemed ironic that the smokers were the most likely to survive an airplane accident. Equally ironic is that the more expensive your seat, the more likely you are to die - the first class passengers are the most likely to die.
2) Know what you're going to do
when the plane comes to a stop. You have about 90 seconds to get out of a crashed plane before toxic fumes overcome you, maybe a few more seconds. Fortunately, most of the people surviving the impact itself will be too shocked to move. In fact, any surviving flight attendants will take several seconds to recover before they start directing the passengers to evacuate. That means if you're mentally ready to evacuate before impact, you have a real good chance of being one of the people that get out within 90 seconds.
3) Forget the elderly or the small! They'll move too slow, so you're probably sacrificing more than one healthy adult for each slow moving old person or child you save. If you planned well, it might be worth a "This way! Quickly!" to an attractive person of the opposite sex as you evacuate. If they don't respond quickly enough, then they probably weren't good reproduction material in any event.
4) Just remember that, no matter how stressful the plane crash itself might be, surviving a plane crash will probably result in http://www.apa.org/releases/planecrash.html (definitely better than the mental health of the non-survivors).
Edit: mgb_phys and neu will probably be one of the non-survivors. People that believe a plane crash is virtually certain death are almost always correct. They're the most shocked about surviving the impact and the slowest to start reacting.