Some of the other ways that can drag in the number of followers are:
1. You can sync your other social media sites say Facebook, Twitter, etc along with the Pinterest account that you have.
2. Preferring the hash tags that are quite prevailing in Twitter.
3. Also, you have to update your pin board with a fresh content with high quality images/pictures.
4. On keeping the pins in an organized way would do so. Added to this, you should also engage actively by commenting, repining, or "Like" a pin.
If these are followed to the most, you'd likely experience the visitors flow to your account, I hope.