While there are many tips you can get on the serve toss, it is well known that a good serve depends on the quality of it.
I’ve found that the best way to consistently put the ball in the air for serve is to “lift” it trying to impart as little spin on the ball as possible.
By doing that you will limit the amount of wrist and fingers action when releasing the ball.
And, in order to have a good balance while serving, keeping the tossing arm up longer (instead of letting it come down early) really makes a difference in your serve control and consistency.
Try these two tips and you’ll see a considerable improvement in your serve.
Have fun on the court,