Because of a combination of health, family, and time zone issues, I sleep approximately 5 hours a night (6 or 7 on weekends, if I'm lucky). I also have a comple

Because of a combination of health, family, and time zone issues, I sleep approximately 5 hours a night (6 or 7 on weekends, if I'm lucky). I also have a complex work environment where the ability to think quickly, have excellent recall, and make quick decisions is paramount (I manage two dev teams working on two very different code bases, facing very different challenges). The people I work with are often "the smartest person in the room" and notice slips and mistakes. Anyway, I get by through a combination of sneaking naps, trying not to sabotage myself by eating/living poorly, and catching up when I can. I suspect the people in this study do the same. They probably doze when on public transportation, or trying to get the kids to sleep, you'll lay down with them and sleep a little. These stolen moments add up. Also, learning to recognize the signs of mental fatigue - if you can't get rest, then, you have to slow down and double check everything, not get irritable, and defer major decisions.