Internal Linking Structure
Having a sound internal linking structure is one of the necessary components that most SEO experts forget when optimizing their websites for the search engines. First, you will need to create a linking diagram that you can for data visualization purposes. (such as Visio)
Next you will need a great top navigation menu. You want your visitors to be able to navigate your website with ease and reach any page within one click. A good seo linking diagram is key to proper structure of your site. I can not stress the importance of the top navigation bar. This is usually where I see other "seo experts" fail by not wanting to put in the level of detail to win.