The lost secrets to perfect sleep are hidden in your grandparents' daily routine.

The things we're finding that help your sleep-wake cycle are all the kinds of practices our grandparents probably followed without even thinking about it — eating during the day, not eating at night; exercising during the day, not at night; exposing yourself to sunlight, or electrical devices mimicking sunlight, during the day and avoiding that at night.

Those are all inexpensive ways that we can all improve our health and well-being.