Don't deny the wing because you can overload on defense when the offense has the ball on the wing -- defense will have a 5/3 advantage.
Teach defensive spacing (jump to the ball).
Jumping to the ball with all five guys should be a priority. Jump in unison. You lose when players come out of their stance and don't jump to the ball. Jump with your hands out.
Building you defense to come back quickly from a point deficit. You must be able to trap and rotate.
What kills good defense? Dribble penetration. Have a system to attack dribble penetration.
