Set both personal and team goals and milestones. Nothing motivates someone like public recognition. Although some may seem somewhat embarrassed by a public display, inside they are proud they have been recognized. There has never been a recorded study that quotes an employee who was honored in public with them saying that they never wanted that to happen again. Celebrate team milestones as well. It breaks up the routine of the workday, gives a well-deserved break, and motivates people to work harder when they return to work refreshed.