When you set up the link structure for your site, you want to maximize the flow of page rank flowed between your pages. One way is to set up a number of site silos. A silo is a bunch of pages that are related by content. The key is arranging the links between the pages.You have one main home page. However each silo should have its own main page. Point links from your main home page to each of the silo main pages. Every page in your silo should link back to the silo main page.
The goal is to funnel the link authority to your silo main pages. Try not to link to other pages. This allows the silo main page link to contain all the juice. Personally I only link out to other pages when a great page warrants it. Otherwise I try to link to my own pages on my site. A silo strategy is a way to organize the links to maximize the result.
