Adding to what others have said: Adjust your desk to the proper height. Beware of a position that has the desk edge -- or, these days, front edge of the lapto

Adding to what others have said: Adjust your desk to the proper height. Beware of a position that has the desk edge -- or, these days, front edge of the laptop -- pressing into your wrists. Do other things that strengthen your hands, wrists, arms, shoulders (and body), and that increase flexibility. I've heard descriptions that ascribe significant portions of RSI to what's going on not just at the hands and wrists, but all the way up the arms and into the shoulders. Summarized: Bad stuff further up (tension, posture, etc.) leads to bad stuff further down. I also thing bad stuff can start further down, e.g. having an edge pressing into your wrists or your wrists formed into a wearing position.