I "teach" proper body position in the boat or on land/dock before getting into the water. Stress using the PFD to maintain body position. I see so many people using their hands to "swim" right before the pull.
Watching the victim (I mean kid/person) on the pull can key you (the driver) into what you need to do: more power, less power, etc. A good mirror and spotter with experience really help a lot.
1997 PS 205