Hello,
I think that a great start is to to watch this great webinar by Rand
"Using Open Site Explorer to Uncover New Marketing Opportunities"
http://www.seomoz.org/webinars/using-open-site-explorer-to-uncover-new-marketing-opportunities
Here you will learn some tips for linkbuilding and how to use SEOMOZ available tools to be more productive inthe Linkbuilding process.
using-open-site-explorer-to-uncover-new-marketing-opportunities