When McKinsey & Company studied the characteristics that drive and sustain top female leaders, energy management was discovered to be a common element of their success. Those leaders understood exactly what drained and sustained them, and I recommend you do the same.
Keep a log of your energetic peaks and valleys for at least a week, and from those insights, build a new routine. By paying close attention, you may learn to avoid the carb-heavy lunches that make you sleepy by 2 PM or to connect with a chatty team member early in the day, when you still have the energy to wrangle his or her whimsy.