Would you be able to use voice recognition software for some of the computer work?

Taking breaks to do reverse postures is always good too.

Ergonomics is more than just a keyboard and mouse change.
It's the whole desk, chair, monitor set up as well.

There are ergo links in this post near the bottom, but those are from 2006 or so , there may be better ergo info sites online now also.
http://neurotalk.psychcentral.com/post388-1.html
Even You tube videos I'm sure..