SEO Maintenance

[JonS]

What are your thoughts and best practices on improving and maintaining your rankings once you've gone through the initial optimization of your site?

Do you have any tools, routine procedures, warning signs, or rules-of-thumb that you follow when maintaining your site and making sure you don't drop in the SE's?

[seobook]

keep building links. search engines make it fairly obvious when your competition is doing stuff. just make sure you stay with them or one step ahead.

also creating new timely content is useful to help you generate more pages and pick up more terms.