Are you blue?

On my road trip I have been doing some reading.  Here is a little tidbit from Dan Buettner's book "Blue Zones":
In traditional Asian thought, the highest, the most honored form of medicine was prevention, and the lowest was treatment.  Today in Japan, the focus is on avoiding disease in the first place, there are massive national and local efforts underway to prevent diabetes and heart disease.  Japan's priorities represent a profoundly different way of understanding medicine.
What are you doing in your life that would qualify as disease prevention?  Just something to think about.  More to come about this book later...