Let me tell you about the single worst thing most people do to their site...

They move pages. Sounds so simple, right? Change a file name, put an article in a different directory, or even give the site a new domain name.

However, when you change the address of a page without leaving a forwarding address, you create three problems:

• You break all the incoming links that were pointing at that page.
  
  
• You break your user's bookmarks.
  
  
• You give the search engines a Not Found error, causing them to drop your page from their listings.

Changing any aspect of your page's URL will result in broken links, broken bookmarks, and de-indexed pages—not to mention lost traffic and revenues for your site. That includes changing any of the following...

• Changing a web page file name, such as flower.html to flowers.html.
• Changing a web page file extension, such as .html to .php.
• Changing a directory name, such as /directory/file.html to /directory2/file.html.
• Modifying (or leaving off) URL variables that are necessary to retrieve a page, such as http://www.domain.com/index.asp?id=45 (where id=45 is a necessary variable).
• Changing a subdomain name, such as www.domain.com/phpbb to forum.domain.com.

In short, changing even the smallest detail of your page's URL (the Intern...