How to begin with the SEO of my website for stock photography: www.lodiko.com ? What are the main points for this kind of websites?
biggest source of traffic for image based sites like yours is images.google.com and not google.com make sure you optimize your website for images ( alt tag, etc etc) also, spread images ( with watermark, that CAN be removed from photoshop) over various file sharing sites, you will start to get traffic pretty soon. open your mind to new ideas.
Site is already PR1, so you might have through SEO half way! Have best keyword research first then SEO for 2-3 keywords.
Outsource it on fiverr! (hardly 5 bucks). There are people who can give you the best report. PM me to know the guy whom am using and am happy with the results.
It is little tough to do SEO for any Image related website in compare to Content based websites. But you can do SEO of Image related website by adding Title, ALT tags in images. So you can let Google know the description or details of any images by adding these attributes in images.