I'm not sure how much I agree with this post but what personally worked for me was simply using the mouse with my left hand instead of my right. I play a lot of video games and 15 years of intense clicking has taken its toll on my right hand so I just limit the mileage I put on it now.
That's not to say never use your right hand at all - If I was playing some FPS I'd happily switch to using my right hand again but giving it extended periods of rest (by not using the mouse) and hitting tough key combos with my left hand (Cmd + Shift + 4 + Space for a screenshot anyone?) were what made things better for me.
That's not to say never use your right hand at all - If I was playing some FPS I'd happily switch to using my right hand again but giving it extended periods of rest (by not using the mouse) and hitting tough key combos with my left hand (Cmd + Shift + 4 + Space for a screenshot anyone?) were what made things better for me.