Executives can use the PACE model by following four steps. Firstly, they need to define their purpose by identifying core values, vision, and mission and use these as a guide for setting priorities and goals. Secondly, they should evaluate current activities and tasks to determine which ones are aligned with their purpose. Thirdly, they should utilize the Eisenhower matrix to categorize tasks into four quadrants: urgent and important, urgent and not important, not urgent and important, and not urgent and not important. Lastly, they should manage their energy levels throughout the day by taking breaks, exercising, meditating, eating well, sleeping well, and connecting with others. Additionally, aligning energy cycles with tasks is recommended to ensure that the most demanding tasks are done when energy is at its peak.