It is important to teach the "why" along with whatever you are teaching.
Correcting an error is 100% better than verbalizing the correction.
Coach Harris' mantra in practice: spend more time on offense but place more emphasis on defense. Offense requires more timing and skill. Defend requires more reaction and less skill.
Containing the ball is the most important aspect of defense in the game today.
It is important to stunt and rotate with an understanding of personnel.
BALL SCREEN DEFENSE
It is important to have a Plan A and a Plan B so that you can easily adjust to different situations.
It takes 5 guys to guard the pick and roll; not just the defenders involved in the ball screen.
Don't accept everything you hear or what you've been doing as the best way today.