Most club players fail to improve their serve because they are not willing to learn to serve using the correct grip. Most beginners use their forehand grip to serve because it is the easiest way to start, but this grip greatly limits their ability to use spin. In order to gain power and control players need to learn to serve using the Continental grip. However, changing grips can be frustrating and many players are not willing to put in the time and effort.
Here is a tip that will shorten the learning curve.