You're a sidearmer, right? Tell me---have you ever tried working with the crossfire? This is a beautiful and deadly move that works only with the sidearm delivery, and I have found that using this move can add both speed and power to my pitches. Let me see now: I'm assuming you're a righthander. So you go into the windup, or the stretch, or whatever---but instead of pitching directly to the plate you take a step toward third base, whip around and fire the pitch in from that direction. I picked up that move when I was thirteen, having read about how Ewell Blackwell used to do it, and I fell so in love with it that I wound up using it all the time, a fact which was not lost on my pitching coach who helped me refine it and once said to me, "You use that move with everything you throw."
And let me tell you, batters have the devil's own time trying to hit it and end up grumbling and grousing their way back to their dugout. I got an awful lot of strikeouts that way.