Simplify the Web

SEOMoz put together quite a decent article about SEO and how it fits into the development life cycle. Very simply put, if you don't think about it as you develop, you will wind up making a ton of changes later. Take the time when you start a project, when you start a website and figure out what you would like to say and how you would like to say it. Great article, great illustration, take a moment to read it!

http://www.seomoz.org/blog/building-seo-into-development-process