At the Dallas Safari Club show in January, I saw a presentation by
Peter Kummerfeldt, who grew up in Kenya before moving to America and joining the Air Force. He was the head survival instructor at the Air Force Academy for over a decade before retiring.
Anyway, the talk was great and he talked about doing things with only one arm. He said that while shows like Survivorman are nice, the host is under no actual stress (think life and death situation) and is in great shape and health. Kummerfeldt stated that in a lot of situations, you will be injured in some way and will be extremely stressed out. His techniques were fairly simple and straight forward, but they were set up so that you could perform them under adverse conditions.
One example: He is of the belief that survival blankets are pretty useless, because they are fragile and easy to tear, and suggests using thick orange trash bags instead. He attempted to prove his point by having a volunteer come up, stick his dominant hand behind his back and then open a backpack to get the blanket out, before attempting to remove the blanket from the small ziploc bag they come in and unfold it with only one hand. The blanket was pretty tough to unfold and get setup one handed because it would stick together, something that wasn't the case with the trash bag.
All of the techniques he showed could be done one handed, such as using your good arm and one of your feet to start a fire with a ferro rod/metal match and Vaseline soaked cotton balls. Regardless of how you feel about the blanket/trash bag debate, the point he made about using your offhand and having techniques that can be done with an injured arm are smart and should be considered by everyone.