We’ve all experienced a horrible night’s sleep at one time or another. The following day can be excruciating to get through. We aren’t as alert, our mood dips, and we’re more likely to make poor choices with food and caffeine for any boost in energy. It’s clear sleep is important to our well being, but recent research reveals the astonishing reason why. During sleep our brains shrink so that cerebral fluid can clear toxic molecules from this hard-working organ. Activating the parasympathetic nervous system, known as the ‘rest and digest’ system, before bed will slow your heart rate, calm your mind, and set you up for a restful night’s sleep.