The biggest thing on the forehand is getting the racket in the pivotal pat the dog position for the modern forehand. When the racket face is open at the furthest point of the backswing, the naturally tendency is to open it up even more as you start the forward part of the swing. There was a good article about the Nikolay Davydenko forehand from TENNIS magazine and his forehand is a perfect model. That was the main thing. Backhand is generally good, except I would prefer altering that swing path a bit to hit with a little more margin. A good way to focus this is to notice where you are following through. You want to finish that follow through high like you are tossing a frisbee because that's where all the spin will come into play.
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Maximagq has a 111 mph serve and 95 mph forehand on video.