I think this is fairly well known, but the guys at OkCupid keep a blog[1] with their own research regarding how to improve your odds. There is, for instance, an analysis about the relation between attractiveness and camera: [2]<p>[1] <a href="http://blog.okcupid.com/" rel="nofollow">http://blog.okcupid.com/</a><p>[2] <a href="http://blog.okcupid.com/index.php/dont-be-ugly-by-accident/" rel="nofollow">http://blog.okcupid.com/index.php/dont-be-ugly-by-accident/</a>