I found myself too many times having to rewrite the last word because I hit the caps lock key by accident. I decided to take care of this annoyance once and for all

Here is how to turn off the caps lock key on OS X Leopard:

1. Go to “System Preferences”
2. Select “Keyboard & Mouse”
3. Go to the “Keyboard tab” and click “Modifier Keys …”
4. Select “No Action” for the Caps Lock Key

Now you will never be annoyed again by accidental uppercase characters. What a useless key …