One of David Lanham's custom icons for The Iconfactory, freely downloadable for personal use.
This is kind of a cool idea from The Apple Blog: a way to use parental controls on your Mac into a productivity tool. Essentially, you can re-jigger its controls so that you’re not constantly tempted to waste time throughout the day on Facebook, Twitter, or whatever your vice of choice may be. You can also customize Mail and iChat so that the only addresses you see are the ones that make it rain for you. There’s a step-by-step and handy-dandy screenshots to guide you through it.