From the guys ive talked to, if i remember correctly, they mentioned that if your going ranger, which is army special operations, they rely on a ton of skills, survival techniques is a big one, martial arts, navigation, etc. Look it up, and you should be able to look at the skill set needed, and start preparing. The more you know before hand, or start learning, the easier it will be to do. It wont be easy, but whatever edge you can get over the competition.

Sounds like fun. And I can practise escape and evasion with all the crazy junkies out in the woods!