Make drills fun...
Jordan Briones has started a new youtube channel with a series of drills. Based on the first video, he does something I like very much. He makes drills a game. This makes what otherwise can be a task into a fun exercise, meaning we all are more likely to do it.
The first video covers straight on dinks - those dinks where a player hits to the player directly across the net in front of him. The players position themselves at the NVZ line across from one another and use 1/2 of the court for this drilling "game".