User-agent: Googlebot
Disallow:
Allow: / # It is not a standard use of this directive but Google prefers it

User-agent: *
Disallow: /cgi-bin/
Disallow: /wp-admin/
Disallow: /wp-includes/
Disallow: /xmlrpc.php
Disallow: /wp-content/plugins/
Disallow: /wp-content/cache/
Disallow: /wp-content/themes/
Disallow: /trackback/
Disallow: /feed/
Disallow: /comments/
Disallow: /category/
Disallow: /*?
Disallow: /index.php # separate directive for the main script file of WP
Disallow: /*.php$
Disallow: /*.js$
Disallow: /*.inc$
Disallow: /*.css$
Allow: /wp-content/uploads/