Most NFL Players have a similar routine up until they get to the stadium. They wake up and have a pre-game meal. If its a late game, they will have a meeting to go over game plan, maybe watch some film of the opponent just to remind themselves everything they studied that week as a last minute refresher.
At a time where we celebrate labor in this country, the NFL's labor force is drastically reduced as teams pare their rosters for the opening of the season. Prior to this weekend, there were approximately 2800 players in the NFL; now there are approximately 1900, as a third of the workforce has been scrubbed.