richwdf

I would recommend you use www.xml-sitemaps.com which will generate the site map for you, it's free to use if you have less than 500 pages.
 
Simply enter the url of your site, select the change frequency (I generally select monthly but thats up to you), select 'Use server response' (i.e. when the file was last modified), then select 'automatically Calculated Priority' - though note you can always edit the final page in notepad or similar before you upload it.
 
The option for 'last modification' assists the search engines if you have made any changes to your website since they last visited - NOTE: you DO have to remember to update your sitemap whenever you make changes to your site or they might fly on by!
 
Once you click on 'Start' the site map will be created. If it's not a massive site then you can download it uncompressed as sitemap.xml - once you have done this you can upload it to the root of your server, i.e. yourwebsite/sitemap.xml
 
Once you have done that, either create a robots.txt file or edit an existing one and add the line:
 

sitemap: http://www.yoursite.com/sitemap.xml which essentially tells the search engines where your site map is.
 
It's very easy to do and does help in keeping your site changes up to date.
 
If you have Google webmaster tools you can also submit your new sitemap there which may well speed things up a little with the updates of your site.
 
Hope this helps.