Hmmm...

1. Keep your wrists straight.
2. Do Not put your palms down on your desk or keyboard.
3. Use a high quality keyboard that requires little force to trigger the keys.

Correct typing form looks and feels very unnatural at first, kinda like playing guitar or piano or riding a bicycle. The same things are true with mice.

Cornell has done alot of research on this topic:
12 Tips on Ergonomics

I can type very fast (80+ WPM) and have been doing it for years (I'm 40) and the only problem I have developed is bad astigmatism (LOL).

CTS is generally the result of bad habits, but no one wants to admit that because we like to sue everyone.