[lagster]

Many good things here!

I believe many/most people are not practicing well. They may think they are, but often are not very close to doing what they want to do. They may have the correct information, but they simply are not doing what they think they are doing.

Solution... they need to be monitored while they practice. If the student gets the correct information, then is monitored, at least some, during each and every practice session... he will improve, and probably improve drastically. He won't be able to practice wrong.

Many tour players do this. Nearly every time they practice, they have their teacher, or caddie, or someone they trust watching.

If you know you have good information, but are not improving... try to figure out a way to do what I'm suggesting. Eventually, after a sound technique is learned, the player can gradually be reduced off this, until he is monitored less frequently.