How Actor Tim Blake Nelson Mentally Prepares for His Biggest Roles

Actor, writer and director Tim Blake Nelson is best known for his roles in "O Brother, Where Art Thou?" and "The Ballad of Buster Scruggs." Nelson, who is now a frontrunner in the Emmy race for his most recent work in HBO's "Watchmen," explains how he mentally prepares to play some of the most iconic characters in film.