How to add extra security

Hello all,

I was wondering if there was any advice on how ta add extra security to my blog? Usually a good idae is to change the name of the standard administartion folder which in this case is wp-admin. Is there a good and easy way of doing this or willthis create huge problems.

I am going to add a htaccess/htpasswd file for the admin section which will add extra security but I was wondering if there were other options.

Regards,

Martin