Here are my favorite .htaccess codes for WordPress
RewriteEngine On
RewriteCond %{REQUEST_METHOD} POST
RewriteCond %{REQUEST_URI} .wp-comments-post\.php*
RewriteCond %{HTTP_REFERER} !.*domainname.com.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^$
RewriteRule (.*) ^http://%{REMOTE_ADDR}/$ [R=301,L]
This one helps block spammers from sniffing out your wordpress and post random comments.
RewriteEngine On
order allow,deny
deny from all
Helps protect your .htaccess from intruders.
