Try to move so that when you play forehands, the ball is exactly where you like it. You can either move forward quickly and take the ball on the rise or retreat and play the shot as the ball is descending from the peak of its bounce.

Of course, this is not always possible. When you are forced to play a ball that is too high for comfort, play the shot conservatively. When the ball is where you like it, let it rip. This is called shot selection.