In additional to what Toby recommended, there are a few more things to consider:
1. Have an automatic backup file rotation scripts to avoid out of space situation.
2. Make sure to send the backup files to separate machine
I found that this scripts useful : Tableau Server housekeeping made easy - The Information Lab
I had to modify it to make it work for Windows 2012 server (see attached backup scripts and file copy scripts) - you could combined them into one script if you do not get into network file deletion permission issues.
we have a backup script that runs daily and we do not have any issues.