There’s some basic information about ourselves that we rarely if ever, act on: When are we sharpest or dimmest—or happiest, or flattest—throughout the day? Or, for nocturnal types, the night? Although we may know our patterns well enough to answer that question, most of us schedule events—or get pulled into them—haphazardly. This is especially true for workday meetings. “The only criterion we use is availability,” says author Daniel Pink. He calls this habit “managerial malpractice.”