Have the players involved in every part of the drill. This makes the drill competitive. The players are athletes because they love competition. Use this to your advantage in practice. Reflect tempo of actual game situations.
Most drills go faster than game situations.
Make sure that you run at least one or two drills per practice that reflect the slower game-like tempo. This list will start off with one of each type of drill and will grow as I have more time. They are to play the ball and the three attackers will attack from the back row. Every time the ball goes over the net, the team that hit it over rotates clockwise with the setter rotating out to the line outside of the court, while the first player in that line moves into the right back position. The player that comes in last place in the race, runs another one.