I amsuffering from cad.what precautions should i take?

Diet, meds.: Low salt diet, cardio exercise, and making sure to take your cardioprudent medications (aspirin, beta blocker, ace inhibitor, statin).

CAD: If you have CAD get rid of the tobacco. Eat a mediterranean diet, get at least half an hour of aerobic exercise a day, and see your doctor about what medications you should be taking and what else you should be doing.