In order to fully demonstrate what I am talking about when I discuss my running form, here are some screenshots from the video analysis I took of myself running yesterday.
Good (Midfoot Strike and little pronation):
Bad (Over Pronation): You can see how the ankle and foot cave inward.
Video Clip (Some Good and Some Bad):
One thing that jumps off the video to me is that my feet appear to be running down the center line of the treadmill. In my next session I am going to try to focus on landing them on the sides of that imaginary line rather than directly on it. I think this could be a big reason for the pronation.