I have been spending a lot of time just grooving my serve and the power and spin has gone up by a lot. The main fix was focusing on getting into the trophy pose with a high toss and my knees bent. I dont really think too much about the racquet takeback as much now, I just get into the trophy pose. I see some players who lag behind with the racquet so the tip is actually pointing at the ground still when they start their toss. I can do that with some success, but basically I am having days where I am crushing my serve and others where it almost feels like I "lost it". When that happens I just think of getting the toss high and in the court, and bending my knees.. The one bad habit I really need to fix is sometimes losing control of my wrist on the swing to contact. This results in balls that shoot too far right because the racquet face is opening wrong. My question is this...if I put down my racquet and aimed the bottom of my palm like it is karate chopping the ball, and swung at it like a serve..is this the correct swing to contact? Getting the feel for it and keeping it consistent has always been my biggest challenge as I used a lot of wrist action when I used to throw a baseball. Just trying to get a way to practice this as when I do get things going, my serve is effortless and very tough to deal with. It basically wins me matches. I am just still in that stage where I lose it some days and revert to old habits.