Attention to office ergonomics and computer ergonomics is required to minimize the risk of repetitive strain injuries. 

These links to office ergonomics and computer ergonomics websites provide important safety tips to avoid repetitive strain injuries. Good luck.

Harvard University RSI Action website

Guidelines from Apple Computer on avoiding repetitive strain injury

Hewlett-Packard Safety and Comfort Guide

Tips on avoiding eyestrain from Johns Hopkins

Keyboard shortcut keys explained and listed   By using keyboard shortcuts more and the mouse less, your motions are more varied and less repetitive. This is a good thing.

Substituting keystrokes for mousing is even recommended by OSHA

Warning: Computer use without rest breaks can cause DVT     DVT can be a serious, life threatening medical emergency. The American Heart Association estimates that approximately two million cases of deep vein thrombosis (DVT) occur each year in the United States, accounting for about 600,000 hospitalizations. Between 60,000 and 200,000 annual deaths are attributable to pulmonary embolism (PE), the primary complication of DVT.