Ergonomics is one of the first things users address when confronted with a RSI such as Carpal Tunnel Syndrome. It is really important to setup your computer workstation properly. Improperly setup computer desks cause extra strain on your hands, wrists, back, and body. Even the most ergonomic setup is not going to prevent overuse, but it is a small step in the right direction.
One of the first steps people take when diagnosed with a RSI such as carpal tunnel syndrome, is to switch to an ergonomic keyboard. Here are some ergonomic keyboard that I have and continue to use and recommend.
The DVORAK Keyboard Layout is an alternate way to layout the keys on a keyboard created back in 1936 by Dr. Dvorak. They keys are laid out so less finger motion is needed. The common QWERTY layout was chosen to prevent typewriters from getting stuck.