Have you ever come across a site or application that works exactly like you imagined or visualized? PrintWhatYouLike.com is like that. I was looking for a (web)app which would enable me to select parts of webpage and print. This would avoid site navigation, ads etc as well as save on paper :-)
This is exactly what the site enables you to do. A very helpful video is available to walkthrough entire process. Highly recommended. (via gHacks.net)
PrintWhatYouLike.com {beta}: Save money and the environment printing only what you like.