Before you reach for the saltshaker, consider swapping your snacks for a healthier option.

When there is a psyche-disrupting event in your life, it can prevent you from getting the long blocks of sleep at night that are so important to healthy aging.

I get up at the same time every morning.

That's how most men connect - in bed. The physical connection is important because it reinforces the emotional one.

Here's the number one reason Americans are heavy: The brain, very smartly, wants nutrition. But the average American is not eating nutrients; he or she is eating empty calories. So you finish that 2,000 calories and your brain says, Keep going until you get nutrients.

In my business, if I get too close to you and you die, it hurts me. And so you develop a natural inclination not to be close to the patient, so that if things don't work out ideally, you can still get up the next day and care for the next patient.

There are really two things that drive New Year's resolution success. Number one is telling somebody about your goal. Chances are, they'll either join you in pursuing it or at least support you. Number two is to be concrete and specific. You don't want a goal like "becoming a better person," because there's no objective way to judge that. It's got to be something like "I'm going to call my mother once a week." Or "I'm going to cut my body mass index to 25." It can't be fudgeable.