Work until preparation becomes part of your personality.

Preparation done occasionally feels like effort and takes willpower every time. Preparation done long enough stops being a decision and becomes a trait, something you would find strange not to do. That shift matters because willpower is unreliable and character is not. It is also how people who seem calm under pressure got that way, since most of their composure was assembled in advance.

Choose one preparatory habit that would remove a recurring scramble from your life. Setting up tomorrow the night before, reviewing before the meeting, packing before the morning. Repeat it until skipping it feels wrong rather than easier.