The most common objection that I hear to walking as exercise is that it's too easy, that only sweaty, strenuous activity offers real benefits. But there is abundant evidence that regular, brisk walking is associated with better health, including lower blood pressure, better moods and improved cholesterol ratios.

Giving gifts to others is a fundamental activity, as old as humanity itself. Yet in the modern, complex world, the particulars of gift-giving can be extraordinarily challenging.

Whenever the immune system deals successfully with an infection, it emerges from the experience stronger and better able to confront similar threats in the future. Our immune system develops in combat. If, at the first sign of infection, you always jump in with antibiotics, you do not give the immune system a chance to grow stronger.

Fear and greed are potent motivators. When both of these forces push in the same direction, virtually no human being can resist.

Please keep in mind the distinction between healing and treatment: treatment originates from outside, whereas healing comes from within.

If I had to limit my advice on healthier living to just one tip, it would be simply to learn how to breathe correctly.

Fitting a walk into a busy life can be challenging, so I suggest walking rather driving to work or to run errands as often as you can - in other words, think of walking as alternative transportation.