We all know what the link building methods in the "old days" consisted of...Blasting a site with tonnes of forum links and blog comment links and waiting for the "juice" to kick in.Was easy enough and could be automated with software - which is exactly why these kind of links were then made nofollow!However, while I don't advocate building links in this way - there IS a viable way of building links using forums and commenting on blogs... Here's how it should be done.