Well, I'm sort of athletic, and an entire freshman year's worth of playing army in ROTC classes and labs has given me a very basic grasp of squad tactics. So, in the event that my party and I had to do battle with a hostile force of bandits, aliens, robots, or hyper-intelligent apes, my "experience" (note the quotation marks) might give us a fighting chance.
Also, I know how to make a decent campfire, how to use a gun, and I can tell whether or not a snake is dangerous at a glance.
Oh, and I imagine that I would be a good food source in the event of my death. So there's that.