While we're on the topic of cron jobs, one system cron job you should consider is backing up your Magento database. As usual, this advice is based on hard-earned experience. In the course of working with Magento, and especially if you have clients who have permissions to add extensions and change configuration, you may need to restore the Magento database to a previous working state.

While most server hosting providers provide backup services, restoring just the Magento database can take a long time as server backups restore all the files on the server, not just your database. Some providers do provide specific database back-ups, but to be safe, it doesn't hurt to schedule your server to do your own back-ups. Additionally, learning how to quickly and easily back-up and restore your database will come in handy, since you should always do a back-up of your database before installing new extensions or significantly changing configurations.