It's a lot of fun to promote my own and other people's work on Pinterest. I usually pin while I'm watching the activities feed. When I see something I really love, it gets pinned quickly, and that way, I'm not on the computer all day (just half).
I love promoting almost as much as I like creating my own work, so if I see something I especially love, I'm going to give that artist a little leg up by pinning their item. It's just another way to make a treasury except, here, you can also post some of your own items too.
It gives me something to focus my dreams on, kind of like making a virtual treasure map or collage of my likes and loves. And it tells my family where to look when they're guessing about gifts for me.
I do get views from Pinterest. I like that. So far, no sales, but I've just been there a few weeks and am still growing a following. I also hope those I've pinned are getting an increase in attention.
All in all, good. The one downer is the tendency to become addicted so I caution you to remain (somewhat) disciplined about how much time you spend there.