a couple of pointers:
I know it's fun and exhilarating crushing the ball - and there's a time and place for that, but if the purpose is to groove your technique, I suggest you slow down and focus on the whole kinetic chain. Start slow and focus on a smooth movement, involving your whole body.
One thing you don't do consistently is loading up properly on a low foundation and engage your non-hitting arm properly.
I would start with that, focus on getting low and practice a smooth, balanced movement. Don't worry about power, or if the ball supposedly goes long or short at that point. It's all about finding a smooth, balanced and relaxed movement and get that into muscle memory.
This video is a good example on a proper load up: http://www.youtube.com/watch?v=GiyoprgixTs
look at 1:57 - and don't worry about getting air, but rather focus on the low load up he's demonstrating there.
That's all I would start with - good luck and post some progress!