Our Search Engine Optimization Starter Guide covers around a dozen common areas that webmasters might consider optimizing. We felt that these areas (like improving title and description meta tags, URL structure, site navigation, content creation, anchor text, and more) would apply to webmasters of all experience levels and sites of all sizes and types. Throughout the guide, we also worked in many illustrations, pitfalls to avoid, and links to other resources that help expand our explanation of the topics. We plan on updating the guide at regular intervals with new optimization suggestions and to keep the technical advice current.
So, the next time we get the question, "I'm new to SEO, how do I improve my site?", we can say, "Well, here's a list of best practices that we use inside Google that you might want to check out."
via : http://googlewebmastercentral.blogspot.com/2008/11/googles-seo-starter-guide.html