Since the introduction of the Penguin update and what some SEOs like to call the BLOOPER algorithm (Back Link Over Optimisation Penalty Exterminates...
The new seo is a pain in the you know where, but it its what it is. Despite my strong belief the best SEO is NO SEO http://scenttrail.blogspot.com/2012/04/best-seo-is-no-seo.html now you have to clean up your room first. This post explains how.
Via Luciana Viter