Just because you created a new Pinboard doesn't mean you have to fill it up right away. Because although you may feel a sense of satisfaction upon seeing your brand-new board filled with pins, your followers will log on to Pinterest to find their pinstreams clogged with 100 images from the same damn jewelry site, or 50+ uncredited scenic landscape photos from tumblr. For example.
Think of your followers, and remember that they follow people other than you. People whom they actually know and like and who are more selective about what they pin. Those who pin with careless abandon may find themselves losing followers, namely, me.