If you like to use the link wizard to link to an internal or external url you may want to change the start tab. You can to this very easy. Just open the tca.php of your extension. Find the field you want to change and replace "script" => "browse_links.php?mode=wizard", with "script" => "browse_links.php?mode=wizard&act=page", to start with the internal link selector.
Some code snippets which I need in my daily life