Operational, step-by-step material, as a topic area in its own right.
A playbook for building your own personal, incident-ready troubleshooting checklist — a concrete template plus the reasoning for why a checklist beats relying on memory under pressure.
A concrete, step-by-step playbook for rolling back a bad production deployment: confirming the problem, choosing revert vs. redeploy, executing safely, and verifying the rollback actually worked.