I think in this article you can find the most important rules for getting the image that attracts peoples' attention. I hope it will be useful to everyone, especially to people who sell their prints:) http://www.dpmag.com/how-to/shooting/photos-that-sell.html
I'm not yet skilled enough to think about selling photos, but the article really made me think about what makes an interesting, dynamic photo. Thank you for sharing.
http://www.dpmag.com/how-to/shooting/photos-that-sell.html