Block Bad Bots
# Block one or more IP address.
# Replace IP_ADDRESS_* with the IP you want to block
<Limit GET POST>
order allow,deny
deny from IP_ADDRESS_1
deny from IP_ADDRESS_2
allow from all
</Limit>
Disable Directory Browsing
# Disable directory browsing
Options All -Indexes
Allow Only Selected Files from wp-content
# Disable access to all file types except the following
Order deny,allow
Deny from all
<Files ~ ".(xml|css|js|jpe?g|png|gif|pdf|docx|rtf|odf|zip|rar)$">
Allow from all
</Files>
Restrict All Access to wp-includes
# Block wp-includes folder and files
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^wp-admin/includes/ - [F,L]
RewriteRule !^wp-includes/ - [S=3]
RewriteRule ^wp-includes/[^/]+\.php$ - [F,L]
RewriteRule ^wp-includes/js/tinymce/langs/.+\.php - [F,L]
RewriteRule ^wp-includes/theme-compat/ - [F,L]
</IfModule>
Allow only Selected IP Addresses to Access wp-admin
# Limit logins and admin by IP
<Limit GET POST PUT>
order deny,allow
deny from all
allow from 302.143.54.102
allow from IP_ADDRESS_2
</Limit>
Protect wp-config.php and .htaccess from everyone
# Deny access to wp-config.php file
<files wp-config.php>
order allow,deny
deny from all
</files>
Deny Image Hotlinking
# Prevent image hotlinking script. Replace last URL with any image link you want.
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourwebsite.com [NC]
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourotherwebsite.com [NC]
RewriteRule \.(jpg|jpeg|png|gif)$ http://i.imgur.com/MlQAH71.jpg [NC,R,L]
Enable Browser Caching
# Setup browser caching
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 2 days"
</IfModule>
Source