How to Backup Your WordPress Database
With all of the hard work that you put into updating your site with new content, the last thing you would ever want to have happen is to lose all of your content should something happen to your WordPress database! That is why I highly recommend that you backup your WordPress database on a regular basis.
Using the WP-DB-Backup plugin for WordPress, you can schedule an automatic backup of your WordPress database at a pre-determined interval (hourly, daily, weekly, etc.) This video explains how to activate the database backup plugin, and how to configure the settings to automatically e-mail a copy of the backup to whichever e-mail address you choose, once per day.