AutoMouseClicker will automatically click the mouse for you, you can set it to click only after you move the mouse and to wait a certain amount of time.  This helps lessen the strain on your injuries. The less clicking the better. Best of all, it is free.

RSI Warrior is a software package I have used to fight RSI.  It brings up rest break reminders, stretches, ergonomics tips, and automatic mouse clicking. Try the Free Demo

Of course, the best bet is to try to minimize use of your computer! That works the best.