Player X: 10 NFL playoff lessons

Kurt Warner is one of the guys who puts in the film work. And it shows. Mark Cunningham/Getty Images

Player X is a concept running throughout the 2009-10 NFL season in ESPN The Magazine; essentially, it's an NFL star contributing his thoughts on the world of sports anonymously. This specific column appears in the January 11 issue of ESPN The Magazine. For a more detailed archive of these entries, please click here.