Just live a normal simple life, far from big cities and stress.
Stress is one of the biggest threat to human health.

My life motto is: smile, tomorrow will be worse.

Every day laugh at least once. A day that you didn't laugh is a lost day in your life.

I eat almost anything is comestible and have good taste, in regular quantities, without excess. Restricting some food from your diet, because x and y said something that "is not good for your health", I think is stupid. Eat whatever you like and make you feel good.

My "secret" of being healthy? Never listen the "doctors", never go to a hospital or medic. If I feel bad, I just relax, sleep well and think what I did/eat previous days. For each "bad feeling" there's a natural cure treatment, a plant or something.
No fucking pharma pills!

Also a lot of walks into fresh air and nature. My every morning exercise is to walk some few km into a mountain path, early in the morning, when all creatures are waking up.
Also I do long hiking walks. Living in a high mountain area is an advantage. Many mountain people live longer...