In order to win in the NFL, you still need a quarterback and a solid defense. But this season you’ll also have to tackle the same problem facing every office in the world: a solid time-management plan.

This is the problem the Buffalo Bills faced when a new coaching staff, led by Rex Ryan, came to town this year. Because of recent regulations, practice time has never been more precious. And according to coaches, the attention spans of their players—most of whom are millennials—have never been shorter. The old methods simply...