Samson, I have a question.  Where should I contact most of the balls – when the ball is rising, when the ball has reached the peak in the trajectory, or as the ball is falling?
 
 
 
Good question.  I’ll give a separate answer for each stroke.
 
When blocking, it is important to contact the ball on the rise; this will help you to keep your block low and give your opponent less time to react.