I believe that good defense embodies seven cardinal principle: reduce the number of your opponent's shots; force your opponent into low percentage shots; control everything within 18 feet; eliminate second shots; no easy baskets; point the ball on all long shots; and prevent the ball from going into the pivot man.
If a Coach is determined to stay in the coaching profession, he will develop from year to year. This much is true, no coach has a monopoly on the knowledge of basketball. There are no secrets in the game. The only secrets, if there are any, are good teaching of sound fundamentals, intelligent handling of men, a sound system of play, and the ability to instill in the boys a desire to win.