I recently listened to a Tim Ferriss podcast with James Nestor, the author of Breath. It was so intriguing to think about how much our breath impacts everything from our sleep quality to our focus and stress levels.

The simple act of breathing through your nose — rather than your mouth — can improve sleep, reduce anxiety, and increase focus. I tried the techniques Nestor described for two weeks and the difference in my sleep was noticeable. As entrepreneurs, we’re always looking for performance edges. This one is free, requires no equipment, and you’re already doing it. You’re just doing it wrong.