Sitemaps, an often overlooked optimization tool.

Sitemaps are simply a map of your site showing the structure, sections, links, etc. Sitemaps make navigating your site easier for your visitors and the search engines.

There are two sitemap versions you'll need, The visible one on your site for visitors and a XML version for the search engines.

Google explains sitemaps and offers a free creation tool at "Using Sitemaps".

More Sitemap tools:

SitemapsPal...Free XML sitemap creator.

Sitemaps Builder... Free online XML/HTML Sitemap builder.

SitemapDoc... Google Sitemap Generator and Editor.

Free Sitemap validator...Validate your sitemap, or changes to it, for free. Other free tools available.

From a SEO standpoint, using a sitemap is vital. Your site will be recognized quicker by the search engines and you can immediately notify them of any changes.