Of all of the various blogging/tweeting/favoriting social media-related activities that I've explored, the most addictive and least time consuming has been "pinning."
I set up my Pinterest account about a month ago. And by adding a "pin it" function to my tool bar, I was able to add and label images in seconds. SO much easier than saving pictures to folders (which I have to admit, I still do - but old habits are hard to break).
Here are some of my pins:
Not sure if Pinterest is still being beta tested (I had to wait a few days after requesting an "invitation")...but I definitely recommend joining! And of course following me (see blog sidebar...)