Time management is only half the equation. You can have all the time in the world and accomplish nothing if your energy is depleted.
Energy comes from multiple sources. Sleep, nutrition, exercise, and purpose all contribute. So do relationships, environment, and the nature of your work. Managing energy means attending to all of these.
Notice your energy patterns. When are you sharpest? When do you fade? Schedule demanding work for peak energy. Save routine tasks for lower energy periods.
What drains your energy? What restores it? The answers guide better energy management.