Here you can find the very best ways to enhance your ranking...
And get the robots very excited about your web site.
You have only some very simple things to do.
Here are listed some tips:
First: Place the next code (instead anything else)
At the top of index.php in your Web Site
(works with Apache Servers)
header("Status: 404 Not Found", false, 404);
Second: Do not omit to change your robots.txt
You have to add these lines :
Third: Change the line
<meta name="robots" content="index, follow">
<meta name="robots" content="noindex, nofollow">