Starting a business — and managing a business through an economic downturn — can mean working longer hours, experiencing greater stress.

Which means not getting enough sleep. The National Institutes of Health estimates between 50 million to 70 million Americans suffer (whether they realize it or not) from chronic sleep deprivation.

A lack of adequate sleep only increases the challenges of small-business ownership. Research shows sleep plays an important role in daily functioning: A lack of adequate sleep negatively affects mood, motivation, judgment, and your perception of events.