How do you think about hitting different serves? I basically only have one service motion and I want to know when your hitting a "slice" serve or a "kick" serve mentally what do you tell yourself? Do you say i want to hit up on the ball for a kick? Do you not think about it and just say okay now kick serve? Do you just change your toss? Do you change your grip? Is it just all in the wrist? My second serve is just like a slower first serve and I want to add more spin instead of doing that..