One of the most important factors in Search Engine Optimization is the number of incoming links to your website, the relevance of the website linking to you, the anchor text used for the link, and the page ranking of the webpage linking to you. We have tried it and have found it very useful to increase our page rank on google. We are a tender information portal, www.tradereader.com. We used tenders as our anchor text. We suggest any site to try and increase the backlinks.

true but link building with "no follow" links doesn't help.