This article is in, of all places, the New York Times.  The author is a staff writer for theFootballguys.com.  in the article, he describes film evaluation at two different positions: quarterback, and running back.  He compares and contrasts measures that, in his opinion, differentiate the talented from the successful players.  You'll find some of your current most or least favorite players, and even a couple of potential future Texans.

N.F.L. Draft: The Fine Points of Game Film