The irony of it all is that many of us are suffering from sleep deprivation so that we can work more, but the drop in performance ruins any potential benefits of working additional hours.

In the United States alone, studies have estimated that sleep deprivation is costing businesses over $100 billion each year in lost efficiency and performance. 3

As Gregory Belenky, Director of the Sleep and Performance Research Center at Washington State University, puts it: "Unless you're doing work that doesn't require much thought, you are trading time awake at the expense of performance."