I always advocate for monthly "pull the plug on the box" tests. If you don't need "high availability", then it will test your backups and restore process, and

I always advocate for monthly "pull the plug on the box" tests. If you don't need "high availability", then it will test your backups and restore process, and if you do need "high availability", it will ensure your failover processes are running smoothly. Not to mention it trains everyone involved what to do in an emergency since it should be second nature by the time it really happens. If you can't go "Full netflix" and unleash a chaos monkey on your servers, at least setup a maintenance period where downtime is somewhat expected, and do it then.