said 1 year, 3 months ago:
Not that I’m any kind of Pinterest expert, but I would definitely look at that as one potential tool.
Free pic of the day is also a good, proven method.
You might also create a free resource for bloggers; they can use your images as long as they create keyword rich links back to the site.
Affiliate sales: get people selling your photos for you!
Hope this points you in the right direction.