Recommendations: Provide an HTML sitemap to your users with links that point to the important parts of your site. Links embedded in menus, list boxes, and similar elements are not accessible to web crawlers unless they appear in your sitemap. If the sitemap is larger than 100 or so links, you may want to break the sitemap into separate pages.
Provide a search option on each page of content-rich websites.
Do not create or direct users into pages that have no navigational options. No links out of these pages found.
Use site maps for websites that have many pages.
