I understand that many people here run niche sites and networks targeted, my scenario is different. I run a modeate sized portal with true content and editorial staff of nearly 10 people. We get over 20,000 unique visitors per month. How would recommendations change for doing SEO for such a site. The site already has a PR of 4, last year it had a pr of 5 and more visits per month. This is why I want to do SEO to get things back up.