I get made fun of for it now, but what I did was take two keyboards, and use one for each hand. Spreading my arms apart so that my wrists weren't cocked out really helped me...so much so that I've been able to go back to one keyboard (my trusty IBM model M). Think more about hugging your monitor than poking it in the stomach (if that makes any sense...I mean the orientation of your hands).
The other thing that I did was replace my regular mouse with a trackball. (A kensington expert mouse [http://blog.nongraphical.com/wp-content/uploads/2008/08/expe...).
I really enjoy coding...so it wasn't so much a "what else can I do" situation for me, it was a "how can I keep doing this".