In the site SEOBook, that supports The Blogger's Guide to SEO - by Aaron & Giovanna Wall, the authors have written that SEO methods are different for bloggers. They need to build a reader base and trust. They have to be more visible in the blogosphere.
Bloggers guide to SEO
The knol that Aaron Wall posted which was referred to in the above blog post was reshared by me in http://knolshare.blogspot.com/ with the name SEO Basics - Search Engine Optimization Made Easy - Reshared Knol