When building incoming links to your site, it is important to remember that not all links are created equal. And the Google pagerank of the site linking to you is far from the only factor.It is a well-known fact, for example, that links coming from blogs are especially helpful in improving your rankings. What most people don't know is why exactly that is the case.One must realize that one of the most powerful types of link exchanges known to man is a site-wide sidebar exchange between two blogs, also known as a blogroll exchange. Such an arrangement, in effect, creates the potential for each party to receive hundreds (or even thousands) of relevant backlinks. This is due to the fact that each and every page of Site A links to the homepage of Site B, and vice versa. As you can see, an excha...