I was going over Jeff Johnson’s blog this morning and found one of his posts about “secret Google codes” and decided to investigate out of curiosity. I found a free ebook by Ryan Deiss about little known search strings for blogs run at .edu and .gov sites. In a nutshell, you add a relevant keyword to the codes and search, then then return these blogs where on some of them you can leave comments and create an authoritative backlink when you do.

You see,  .edu and .gov sites carry much more authority than other types of domains, so a link from a government blog or at a college gives your site much more importance. I already started leaving some relevant, thoughtful comments on many blog posts I found today. This really is great information and it’s free. You can get the book here.

It does ask to enter your email in the box, but I haven’t been spammed (yet) and you do get instant access without a verification process. I’d recommend it to anyone who wants to build up their pagerank without spending money. I’m a huge fan of natural search engine ranking and this is without a doubt, the most effective way compared to .com blogs, even dofollow ones.