Go to any of the big photo-hosting sites, like Photobucket , Webshots , or Flickr . Find the button that says “browse”, and you get to see a random sampling of pictures that people take and upload. A lot of them let you search by category, sometimes I like to just keep hitting the refresh button to see what comes up.
fark.com - Interesting news stories from all over, and funny Photoshop contests. digg.com - Links to anything and everything, links are “dug” by users to raise their display rank.
If you enjoy picking TV shows apart until your brains come out your ears, Television Without Pity is a pretty good place to head. At times reading their recaps for various TV shows can be frustrating, since the nitpicking can be unreal with some of them, but so long as you don’t take your favorite shows too seriously it can be a blast. The forums are fairly good, as well.
Googlewhack is the most fun, frustrating and best time waster I have ever used. The rules are simple–find two words that are only listed together on one website. Then to up the challenge, try to have a conversation with others on the board.
If you’re a tad bit geeky, this website has all sorts of info, updated daily, on a wide range of science topics ranging from Medicine and Health, Space and Time, Plants and Animals, Matter and Energy, Earth and Climate, Computers and Math, Fossils and Ruins, Mind and Brain…oodles of interesting tidbits.