In the previous segment of this series of articles we discussed the backing up of the MySQL database with mysqldump and cron. I have since (through testing the restore process) revised the script slightly in that article. Please re read the article and add the change to your script.
The most important item to backup with any CMS with dynamic content is the database. Almost all data for these sites are stored in the tables within the database. Because of this it is good practice to backup the database reliably and often.