I am one serious Pinterest fan. I love having aplace to keep all the links I'm interested in all in one place, and see a photo. Much more convenient than having bookmarks, where I have to click on each one to find what I'm looking for.
Another great way to use it: My DD, who lives several hours away, is getting married next summer. When I see something she might like, I post it to a board for her. She "follows" my board, and reposts what she likes to a new board that we both share. Now I know what she liked, and didn't.
My quilting board is a great place to store all those "wanna do's".