User-agent: *
Disallow: /wp-
Disallow: /comments/
Disallow: /trackback/
Disallow: /impressum/
Disallow: /impressum.html
Disallow: /dateien/snowblind
Disallow: /xmlrpc.php
Disallow: /?
Crawl-Delay: 15

# yes, Google understand simple expressions :)
User-agent: Googlebot
Disallow: /*?*
Disallow: */trackback*
Disallow: *html/feed*

# User-agent: Googlebot-Image
# coming soon