Simulate defense on an imaginary offensive player who is playing the wing position.
Start our imaginary defensive position on the block playing off then toward the ball that is at the point position leading to the top of the key.
Practice using peripheral vision for this drill concentration on both the offensive player but also environment around.
Keep body low.
Feet come together but do not cross.
One arm down and in front to prevent the cross over dribble.
The other hand down and in front to prevent the pass.
Rebounding is the least glamorous thing in basketball and one of the most decisive. It is also almost entirely a habit, which means it is entirely coachable.
Good spacing is only the start. The best modern offences teach players to attack the defence's rotations and play in a permanent 4-on-3 - here is how to coach that read.
The ball screen produces almost half of all professional offensive possessions, yet most teams still teach it as a memorised play. The modern approach trains the read - giving players a framework to decide based on what the defence does, not what the coach called.