1. Get a good keyboard. Microsoft Ergonomic Keyboard 4000 is what I use.
2. Use Vim as text editor.
3. Use left handed mouse at least occasionally. Keyboards are typically longer on the right hand side due to number pads so that places mice at a odd angle at times.
4. Though you have already adjusted your position, just ensure that your hands are not at extreme angles.
edit: I too had wrist pain and after doing the above changes, I dont have wrist pain anymore. YMMV obviously depending on what is causing your pain.
Also under no circumstances use a laptop keyboard for extended periods of time. Most of them are very unergonomic. And stop using touchpads if you use them.
As far a number 1 goes, I experienced wrist pain the most consistently when I was using a curved ergonomic keyboard. Based on my personal experience, curved keyboards aren't the best route for everyone.
However, good point about Vim - cutting down on the need to switch from keyboard to mouse and back also seems to help with my wrists.
Another advantage of Vim is that it lightens the load on little fingers. You don't need to press Ctrl or Alt very often. Compare with Ctrl-N, Ctrl-P, Ctrl-F, Ctrl-B on Emacs...
2. Use Vim as text editor.
3. Use left handed mouse at least occasionally. Keyboards are typically longer on the right hand side due to number pads so that places mice at a odd angle at times.
4. Though you have already adjusted your position, just ensure that your hands are not at extreme angles.
edit: I too had wrist pain and after doing the above changes, I dont have wrist pain anymore. YMMV obviously depending on what is causing your pain.