I use Pinterest for a number of things - and really love it. I started with it when I created a vision board for myself as a way to document progress and keep internet related articles, pictures, products.
I am in no way a Pinterest professional, but if you want to check out my site, feel free.
http://www.pinterest.com/donnad1101/I use Pinterest now for these things:
- to document vision board items - Pinterest lets you upload pictures and documents too so it's a good repository
- to promote my shop - a large percentage of my off-etsy views come from pinterest
- to promote other etsy sellers
- to keep track of recipes I want to try
- and of course to pin other items I love to various boards
It's pretty easy to use.
If you're interested in more information about using it for your business, I've found this to be helpful:
http://www.ohsopinteresting.com/