Second, it is fairly hard and the ball will come off it pretty well giving you better and more consistent distance. Now step forward with your left foot as you hit the ball with your right wrist. Stepping forward like that transfers the weight of your body and when you get the timing correct it should add to your power as well. In general, take that step in the direction you want to serve. Unless your swing is wild and crazy, the ball will tend to follow the direction your body is moving.
Technique is important.
A smooth and under control swing is really all you need to serve consistently and well. A wild or over energetic swing just introduces too many variables into the equation and results in wild and inconsistent serves. That will include that step forward and the swing of your arm. The other court is actually a big target. By aiming for the middle, you give yourselft an awful lot of margin for error.