You can create a sitemap very easily by using free services such as:
Start by entering in your main website's URL, selecting the change frequency to update daily. Then, save your XML file and upload to your website's root (http_docs or public_html)
You will want to update your sitemap each time you add new pages to your website, so that it is kept up to date and so search engine spiders are instructed to re-visit your website to index the new pages as they are published.
You will want to update your sitemap each time you add new pages to your website, so that it is kept up to date and so search engine spiders are instructed to re-visit your website to index the new pages as they are published.
Finally, create a free Google Webmaster account at: http://www.google.com/webmasters/sitemaps/siteoverview and add your sitemap's URL so that you are able to instantly update it, at any time as well as monitor traffic stats for your entire website.