"To be satisfied with yourself is a sure sign that your forward motion has stopped" and "Victory requires payment in advance" are both football slogans that can be placed on posters. A good football slogan is meant to get the team and fans excited for games as well as push the team to work hard the entire season.
Notre Dame's "Win one for the Gipper" originated when the team's star football player, George Gipp, was in the hospital during the team's season. Ronald Reagan played the role of Gipp in a movie adaptation of the incident. He later used the slogan as part of his presidential campaign.
"Bear Down," the battle cry of the University of Arizona, originated in 1926. The varsity quarterback for the team was John Byrd "Button" Salmon, a popular man on campus and the student body president. Salmon was in an automobile accident in early October and eventually passed away from his injuries. The coach of the team regularly visited Salmon while he was in the hospital and told the team that Salmon's last message for the team was to "Tell them... tell them to bear down."
Creating a slogan that embodies the team philosophy and environment is important for any football team. Teams such as Notre Dame and the University of Arizona created slogans that came from special players on the team. For other teams a saying as simple as "Play like a champion today" is enough to create a culture of excellence for many years.