One nice thing about JIRA is that it encourages separate namespaces for IDs. You can have FOO-123 and BAR-123. Too many tools want to own #123 and it becomes harder to know what others are talking about.
earlyoom is a neat linux tool that kills processes a little earlier, so your system remains responsive: https://github.com/rfjakob/earlyoom
The readme is pretty educational too, and even encourages you to `tail /dev/zero` to see it in action!
"Conventional commits" https://www.conventionalcommits.org/ encourages a convention of prefixing your commit messages with e.g. "fix: problem", "feat: button".
I've been playing with it, and it's really nice to easily see what features/fixes happened since the last release.