Originally Posted by rufus_smith
Sometimes in warm up, I will pactice some serves standing about one foot inside the baseline and try to not fault. I think it forces me to get more arc or spin on the ball to get the ball in the serve box in a shorter distance. I think it helps to prevent long faults, my nemesis, when doing proper serves.
For my daughter, the opposite works. She has a tendency to hit spin serves short. I have her practice and warm up by trying to hit them long - about halfway between the service line and baseline. They usually still land in.
When she does this she ends up with deep serves with a lot more spin.