There are many approaches to doing backups. Unfortunately, most of them are some variation of "it’s too much trouble". But even if you are doing backups, this article reminds us that Your backup is only as good as your last restore.
Which brings me to another article about backup, this one much more technical and complete, from IBM: Automate backups on Linux. Maybe not everything you need to know about automating your backups, but it’s a good place to start if you need to know your backups are being done, and being done securely.