Former NFL/Super Bowl Coach Tony Dungy:
…I completely believe that three days is all that is needed to prepare for a football game. Any football game. That’s a lesson I learned from Chuck Noll and Denny Green. I also believe that time spent beyond those three days is more likely to be unproductive rather than helpful. I was always willing to listen and learn, but I never heard anything compelling that convinced me otherwise. Maybe my approach was wrong, but we posted some pretty solid results over my thirteen years as a head coach using that process, and Chuck Noll and Denny Green had their share of success as well.
Therefore, whether it was the opening game of the regular season, a midseason game against a team with a poor record, or our Super Bowl appearance against the Bears, I approached each game the same way. As a result, I believe our players performed at as high a level as possible, achieving consistent, sustainable results. When you are leading, your goals should be to achieve success and significance over the long term, not to be just a flash in the pan.
From The Mentor Leader: Secrets to Building People and Teams That Win Consistently by Tony Dungy.