In this article I will review the most important strategies you can incorporate to build links to your site at no cost. But there are more ways to get quality one-way links. It is very important to keep in mind the relevancy of these links. A link is considered relevant when it is coming from a site that contains similar content or services as your site. Could the site linking to your site be in the same category as your site? Keep this in mind for the quality factor of your links. The ones included in this article, are well known to work given their relevancy.