The NBA has the best basketball officials in the world. They work harder on their mechanics/officiating then you could imagine. I know a couple NBA officials and some of them will critique every game they do (they have each came videotaped) after the game. They break down the game-making sure they were in good position (or if they had bad position), was it in their primary, was the call a foul/violation/jump ball/loose ball, what was the score at the time of the call, time, and any other comments about the play. They are constantly trying to improve and become better officials. Amazing that the best in the world work so hard on their game. They are their own harshest critics. If you want a taste of the NBA style/philosophy I highly recommend "Coast to Coast Referee School."
I have attended 3 years and when you leave the camp your knowledge of the game will definately be heightened. You will leave with an understanding of how to improve your game through proper use of videotape. Ron Garretson and Bob Delaney run the camp and usually have between 6-10 other NBA officials helping out. In the past we've had Ed Rush (NBA officials supervisor), Darell Garretson, John Guthrie, Dale Kelly and Jim Jorgensen in attendance.
If you want more info you can check out their website:
http://www.refereeschool.com
or call (610) 783-6336