If you're a pinner your goal is most likely to get the most clicks and repins on the stuff you pin. However just pinning stuff randomly doesn't work. You need to be specific with your pins and the make the image which represents them as interesting as possible. This infographic should be able to help you.
Check out these other related Pinterest articles:
How To Use Pinterest To Drive Traffic To Your Site
Why Pinterest Is Ideal for Designers
How To Use Pinterest for Business & Brand
Marketer’s Guide to Pinterest