Runbooks, essential for Site Reliability Engineering (SRE) and DevOps teams, require regular updates and validation to ensure they remain useful during system outages. The article emphasizes the importance of intentional documentation practices for runbooks, which can include disaster recovery plans and other technical guides. To maintain their relevance, updates should be integrated into production change processes, onboarding, and regular FireDrills, which simulate incidents to test team preparedness. Regular reviews, incorporating dates of last updates and validations, ensure runbooks reflect current system configurations. Additionally, using issue tracking, post-incident reviews, and Chaos Engineering can help identify outdated information and guide necessary updates. Ultimately, well-maintained runbooks contribute to system reliability by offering structured guidance for troubleshooting and preventing failures.