The first time I used it was when I was creating a character profile. I knew some of what I wanted, but I found myself focusing too hard on one aspect and then forgetting the other little fluttering ideas I had.
But my favorite utilization of Pinterest, hands down, is its incredible impact on my writing. Now, I'm a fiction writer and my genre of choice is romance. So while the boards I follow and the pins I love may be different from other types of writers, the motions can still be applied elsewhere.
Romance novels are so much more than the stereotype they're given, and while I may be incredibly biased because of my love for both reading and writing in this genre, I still think that what I've said here needs to be put out in the world. There needs to be a realization that there is nothing inferior about love stories, and that they are just as mind provoking and exciting as any other type of story that people enjoy.