CALMR approach:
Culture - Establish a culture of shared responsibility for development, deployment, and operations.
Automation - Automate the continuous delivery pipeline.
Lean flow - Keep batch sizes small, limit WIP, and provide extreme visibility.
Measurement - Measure the flow through the pipeline. Implement application telemetry.
Recovery - Architect and enable low-risk releases. Establish fast recovery, fast reversion, and fast fix-forward.
Book [paid]: "The Phoenix Project : a novel about IT, DevOps, and helping your business win" by Gene Kim, Kevin Behr, and George Spafford.