Jim Collins (author of How the Mighty Fall: And Why Some Companies Never Give In) had a famous line: "Good is the enemy of great." Those six words neatly sum up the need for a passion for excellence required for any team or organization to reach world-class standards. However, this is an abstract concept and difficult to keep front and center on a day-to-day basis.
Symbolism can be an important part of this motivation as is constant positive reinforcement.
University of Notre Dame football coach Lou Holtz put up a sign that each team member touches before entering the field. It simply reads: "Play like a champion today." With its appearance, team performance "magically" improved--and the sign is now a legendary icon of the university.
Easy implementation: Copy the sign and put it in your stairwells--maybe it is truly magical.
Tougher implementation: Come up with your own symbolism.