The is essential for simulation. Design every drill to be game like. Simulation is the most important word in coaching and maybe the most abused. Drills are to be run at game tempo or faster in the later part of the season. They can be run slower in the early season.
Intervention is important.
Must be in two parts. This is called redirection. Players must know the purpose of the drill, and must be able to visualize how this drill fits into the game plan. Take time to run a visualization session prior to every drill. Have them see and feel the perfect result.