Most people know that the right ergonomic setup is important to maintain not only good productivity but good health. Far too many otherwise healthy and intelligent people, including Mac pundit and New York Times columnist David Pogue, succumb to painful, sometimes even debilitating, RSI or back pain caused by flawed work environments. Lucky for those of us who don't have the time to do a full re-configuration of our computing areas, Macworld has a two succinct and informative articles on small but important things you can do to improve the ergonomics of your desk.
The first article touches on methods for improving over-all physical ergonomics such as screen and keyboard positioning and best practices for how to set up your chair. Once your big picture is all comfy and healthy, it's time to look at the software tools such as TextExpander which can help reduce the amount of repetitive actions one takes in their daily computer usage.