Punch Serve
Hold the racket with an Eastern forehand grip for the punch serve. As your serving motion becomes more fluid, change to a Continental or modified Continental grip.
Stand behind the baseline at about a 45-degree angle to the net, facing one of the net posts. If you are right-handed, position your left foot forward at a 45-degree angle; if you are left-handed, position and angle your right foot forward. The foot away from the baseline should be placed so that an imaginary line drawn along the toes of both feet points in the direction in which you want to serve. Within reason, the exact alignment of the feet is a matter of individual preference.
To toss the ball, hold it at the base of your fingers. Extend your arm, holding the ball in the direction in which you want to hit, and lift the ball without bending very much at the elbow. As you lift, release the ball at eye level by opening your fingers. The ball should go up with little or no spin. Toss the ball so it reaches a peak higher than you can reach with your racket. Work on tossing the ball to the same spot consistently. You will not toss the ball perfectly every time, but developing a reliable toss will be one less thing that can go wrong. The target tosses drill will help you develop a groove (pattern) in your tossing motion.
Tennis: Steps to Success Jim Brown,Camille Soulier