It makes you think, How much time do I spend on these sites anyway?
Since I make my living on the computer and I am generally on it 8 or more hours a day I have a habit of writing an article or a story, or building a website really quick then playing on twitter or FB for a minute before going back to work. That is my break.
I didn't realize how much time I "play" on those sites.
I learned on thing, though. I need to play a lot less.