Inside the psychology of productivity: Burned out? Can't get it all done? The problem might be in your head

You wake up with it in the morning and go to bed thinking about it at night: an ever-crushing load of emails, meetings, conference calls, and tasks that needed to get done yesterday. Family time means reading sales reports in the room where your kids are playing video games. For entrepreneurs, there's soooo much to get done--85 percent of fast-growth-company CEOs work 10 or more hours a day, according to a recent survey of the Inc. 500. Under such circumstances, personal productivity isn't just a metric. It's also a mandate.  Recently, a glut of tools and systems has emerged to help you measure, manage, and maximize what you accomplish. But not all impediments to productivity result from poor organization. Many are psychological. Behavioral economics reveals the wacky ways people think about financial costs and rewards. Similarly, psychologists, business researchers, and even philosophers are illuminating people's idiosyncratic approaches to getting stuff done.