Keep your body clean and disease free.
Exercise daily so that you have better cardiovascular and respiratory performance.
Eat less and suitably to your metabolic needs.
Take prompt care if any of your systems is under stress or imbalanced.
Try to avoid stressed systems to be used ruthlessly
for example you have a digestive problem and still you agree to a dinner party.
You have a heart problem and still you run to catch city bus
or you have respiratory problem yet you do not cover your nose with mask in polluted atmosphere etc. etc.