First and foremost, curse our name. Trust us, it will feel good. Now breathe gently...

Create a simple text file named robots.txt and place it in your server's root directory. (http://www.yoursite.com/ Ç-- Right There!)

Add the following code to your robots.txt file:

User-agent: dotbot 
Disallow: / 

User-agent: yandex
Disallow: / 

User-agent: exabot
Disallow: /