Try to avoid artificial link building methods, like buying and selling of links, use of automatic programmes to create links to your site, etc.. (softloom.com)
Thanks for new tips like Broken link building method. (pcmate.org)
In the rolling Google and Panda updates by Google, sites that use black hat and unnatural link building methods (along with onsite SEO methods) were hit hard in their rankings. (smallbusinessesdoitbetter.com)