One way to slow down your hands to keep up with your brain is to write long hand. That's right, with pencil and paper.
"You mean people do that?"
I've notice these last few months now that I have time to write, and now have no computer, I'm slowing my hands and brain down and actually enjoy the movement of the pencil in my hand. And would you believe the number of pieces I've been able to come up with? It's cool.
Anyway, when you want a break from typing, and maybe your Carpel Tunnel's Syndrome is extra syndromy - try writing.
Oh, and don't forget you'll have to actually erase because you can't backspace on the paper.