Keeping a small server tidy
A short list of habits that keep a small personal server boring and reliable: pin versions, read the changelog before you upgrade, keep one backup you have actually restored, and write down what you changed. Most outages are self-inflicted, and most of them can be avoided by a five-minute note in a text file.
This page collects the notes I find myself looking up again. Nothing here is original; it is just written down in one place.