Prepare now for when something goes wrong! An acquaintance in Toastmasters recently had their blog hacked. They had no backup of the database and lost all their past articles and comments.
If you haven’t already, install WP-DBManager on your wordpress blog and set it up to automatically email a database backup weekly. Check the box for gzip compression to reduce the size. I recommend using a gmail type account for this and then having it archive the emails automatically. The goal isn’t to ever review them but just to have them in a safe place that is separate from your website.