User-agent: Googlebot
Disallow:

User-agent: Yahoo Slurp
Disallow:

User-agent: MSNBot
Disallow:

User-agent: Ask
Disallow:

User-agent: Alexa
Disallow:

User-agent: WebCollage
Disallow:

User-agent: ZyBord
Disallow:

User-agent: Spider
Disallow: /

User-agent: Yandex
Disallow: /

User-agent: Netcraft
Disallow:

User-agent: *
Disallow: /