I've been using Vista for a number of months now and I just found the keyboard shortcuts help page which I found very interesting. By using keyboard shortcuts I significantly reduce my use of the mouse which could also reduce my chances of getting carpel tunnel syndrome. The other way to significantly reduce your chances of messing up your hands is by using an ergonomic keyboard. Since I spend more time at the keyboard than anything else I do, except possibly sleep, I think about these things.
So this week I couldn't get the print screen feature to work. I spent more time than I care to admit troubleshooting on various machines and talking with friends. A friend suggested I check the 'F Lock' key. DOH! Sometimes it's the easy stuff that trips us up. Thanks Philip.