Holy Cow. What a fabulous time waster this is! I cannot get enough!
You add the StumbleUpon toolbar to your browser, and whenever you need a little distraction, click on "stumble" and a randomly generated website pops up on your screen. Don't love it? Click again. And again. And again. It is easy to bookmark sites you want to find again. You know - things you want to go back and read later (yes, I know I am never going to go back and read them, but it feels good to know I could find them if I wanted to.....)
You are warned. You will become addicted. You can thank me later. Go stumble!