This is a try that might be able to help Dwight Howard improve his free throws.
As shown in Figure. Stabilizing the basketball with palm, keeping ten cm between fingers and ball, then hitting the ball with fingers.
By this way, some people have improved their TF obviously
In detail, see the Video
In all sports, the billiard ball is the most accurate. Hitting basketball seem similar.
I hope that Howard can helpe the Lakers to win the championship