“We also let ourselves…

"We also let ourselves be gamed every day by one of the oldest technologies of all: the calendar. Because it displays our nonscheduled time as empty space, our calendar apps encourage us to pack our days with events. Think how differently wed interact with our calendars if the default was for time slots not to be emptyif, instead, they were prepopulated with tasks like thinking, writing, and planning. Wed be far less likely to neglect the opportunity costs: Every time we accept an obligation, it would be clear that we are giving something up."

-- How Online Companies Get You to Share More and Spend More