For years I have been frustrated with the caps lock key. I am a good typer, but I often accidentally press the caps lock key when going for the shift key. In fact, at one job, I went as far as removing the key from the keyboard.
I have found this great little piece of software that makes the caps lock work just like the shift key. You can turn the caps lock back on by pressing shift at the same time as pressing the caps lock key.
You can find it here: http://www.brainsystems.com/capsunlock/