Sleep is largely a combination of our biological responses to Circadian Rhythms. These rhythms like consistency.

The news team manager told me his advertising customers are especially happy if a particularly distressing news story airs just before their commercial.

If you are like many people, you’ve seen numerous reports explaining the reasons we feel tired. Most, if not all, of these reports suggest it is a medical condition -- maybe even genetic. The reports usually suggest a visit to our doctor is in order. 

This is only one possibility. If you want more zip in your life, consider and what you can do for yourself.