Backups are important. Here's my backup plan for my home server.

Never go looking for an old version of an apt package again.

My house doesn't have A/C, so I use Home Assistant plus some indoor and outdoor temperature sensors to have an automation notify me when I should open the windows to cool the house down.

With a simple AppDaemon script, we can send notifications with a given tag to devices that haven't previously cleared them.

Sleeping Z-Wave devices don't check for parameter updates, so we use a bunch of scripts and automations to make them check, based on a configurable schedule.

How to get ancient software to support modern security

Step 1 in documentation: set up the documentation.