Here is a list of 78 search engine optimization resources based on their yield in terms of dollars and productivity. Dave Davies divided the tools and resources into nine sections and sorted through the options. First he broke down the list into categories: SEO, link-building, coding, conversion, convenience, social media, forums, news and blogs, and social profiles. For each, he provides a description and price. Since he is a big fan of Firefox, some tools are extensions for the browser, although many are also available in Chrome.