Hotlinking
Are you getting tired of hotlinking to your images, raising your bandwidth, here is a simple solution, create a htaccess file like this :
## DISABLE HOTLINKING
RewriteEngine on
# Options +FollowSymlinks
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?yourdomain.com/.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?yourotherdomain.com/.*$ [NC]
RewriteRule \.(gif|jpg|jpeg|png|js|css)$ - [F]