We are in the midst of a fatigue epidemic that affects health, safety, productivity, and the bottom line. Sleep loss has been shown to increase our inflammatory and stress responses, which naps can bring back to normal levels.

It has been scientifically demonstrated that naps as short as five minutes long can improve alertness and certain memory processes. But the timing of naps is as important as their length. Imagine sleeping for just five minutes in the middle of the night and think about how you would feel upon waking. Probably pretty lousy. This is because all sleep is not equal. We are biologically programmed to sleep not only for a long period in the middle of the night but also for a short period in the middle of the day.

• Avoid caffeine (coffee, tea, soft drinks, chocolate) and nicotine (cigarettes, tobacco products) close to bedtime.
• Avoid alcohol as it can lead to disrupted sleep.
• Exercise regularly, but complete your workout at least 3 hours before bedtime.
• Establish a regular relaxing, not alerting, bedtime routine (e.g. taking a bath or relaxing in a hot tub).
• Create a sleep-conducive environment that is dark, quiet and preferably cool and comfortable.

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Now, I know lately I haven't done a very good job at creating controversy, and I'm sorry for that. You all have so much less to report. I guess that's why you're covering and commenting on my mood -- my quiet, contemplative moments; my feelings during these final months in office. (Laughter.) In that case, you might be interested to know that a film crew has been following me around the White House, documenting my remaining time there.

This is a strange time in the life of any administration, but I think this short film will show that I have come to terms with it. [5:56min]

Tyrants collect money and power, but they also amass bric-a-brac like the rest of us. What, if anything, do their material leanings signify?

Possible motives for collecting abound: compulsion, competition, exhibitionism, desire for immortality and the need for experts' approval.

Stephen Anderson, professor of neurology at the University of Iowa, has come closest to finding a biological basis for the yen to collect. In 2004 he showed that damage to an area of the prefrontal cortex can lead to hoarding—the pathological cousin of collecting. Anderson doubts that's the case with the dictators. "Most people who have injuries to this part of the brain are not going to be successful," he says, "even in a bad-guy way." Still, he wouldn't be surprised if the bad guys' neural wiring were somehow amiss.

	The Man: Saddam Hussein The Stash: Sci-fi fantasy paintings featuring menacing dragons and barely-clad blondes.
	The Man: Adolf Hitler The Stash: Bavarian 18th century furniture. Munich antique dealers were ordered to keep an eye out for him.
	The Man: Kim Jong Il The Stash: 20,000 videos (Daffy Duck cartoons, Star Wars, Liz Taylor and Sean Connery flicks)
	The Man: Idi Amin The Stash: Several racing cars and loads of old film reels of I Love Lucy reruns and Tom and Jerry cartoons
	The Man: Joseph Stalin The Stash: Westerns with Spencer Tracy, Clark Gable and John Wayne. Stalin also inherited Joseph Goebbels's films.

"All of our research consistently shows that people in general have three goals at work. First is fairness. They want to feel that they're being recognized and rewarded fairly for what they contribute. Second is achievement. People want to be proud of the organization and of their place in it. And third, camaraderie, meaning good working relationships and a sense of belonging to a team. If these three goals are met, you have enthusiastic employees.

The trouble is that, in most companies, morale among new hires is high and then, by about the six-month point, it has dropped sharply. Management has destroyed it. One thing bad bosses do is to deliberately make people feel insecure about their jobs. Another is, treat employees like children or criminals instead of like responsible adults.

A sign of a really bad boss is micromanaging, which I define as devoting punitive amounts of attention to minutiae. We've seen workplaces where people have to raise their hands if they want to go to the restroom. Another sign of a bad boss is when you hear employees say that they get no positive feedback at all. A common complaint is, "If we make a mistake, we hear about it, but for doing our jobs well, there is never a 'thank you'.