In my off page optimization post, i mentioned the importance of gaining back links from other web sites to your website pages. It is also very important to have a proper internal navigation within the site itself. That is, your users can navigate the site, and all the time, they can find link to take them to any previous page in their path.
In this regard, i would recommend having a breadcrumb trail, that contains each page the user went through to reach his current page. Usually breadcrumb trail links separated by greater than sign “>”. Breadcrumb trail helps crawler to crawl your web site, and it distributes page rank among your web site pages.