Every action you perform three or more times, or which has three or more steps in the process, should be documented in your playbook. That is the Rule of Three.
Get everything out of your head and the heads of your team members. The benefits of a playbook go beyond just consistency and continuity. The efforts compound over time creating momentum - regardless of who is deploying them. If a business is driven by maverick talent who operate daily out of their heads, the value is lower than a business driven by the procedures contained in a playbook. The faces on your team may change over time but your processes remain.