New insight into the power of circadian rhythms reveals several helpful ways to improve sleep and wakefulness. Use these simple adjustments to feel better, have more energy, be more productive and improve quantity and quality of sleep—all great ways to live happier.

Your circadian rhythm refers to your innate 24-hour body clock. You function best when this body clock is stable. Due to our connection with nature, light is one of the most powerful regulators of this clock. Use light exposure in positive ways and manage stimulants.