“I’ll just wake up early, grab a big cup of coffee, and then begin powering through my to-do list. Maybe I’ll break for a meal, or a stretch, or a quick conversation with a coworker. But I’ll truck on, energy unwavering until bedtime, where I’ll promptly fall asleep for eight, wonderful, uninterrupted hours of sleep. Cool fantasy, self. Real life is rarely — if ever — that picture-perfect. Our bodies aren’t designed to operate at a constant 100% efficiency level.?So if you want to be more productive throughout the day, you’re better off relegating certain activities to certain times, and devoting yourself to doing those activities within those windows.