Just a few quick notes on how to redirect website to force www or to force just the domain name when users visit your site.
.htaccess Redirect non-WWW to WWW
This will redirect http://my-domain.com/ to http://www.my-domain.com/
RewriteEngine On RewriteCond %{HTTP_HOST} !^www. RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
.htaccess Redirect WWW to non-WWW
This will redirect http://www.my-domain.com/ to http://my-domain.com/
RewriteEngine On RewriteCond %{HTTP_HOST} !^my-domain.com$ [NC] RewriteRule ^(.*)$ http://my-domain.com/$1 [R=301,L]