Olive oil can be used to replace all your other oils including butter, margarine and cooking oils. And it is good for you. Work more cereals and whole grains into your diet. Again, there are supplements available if needed. Reduce processed sugar and salt intake.
Some salt is required daily.
This can also help you use less salt. Eat less processed foods and more natural, whole foods. Give up smoking and drinking. Look for herbal alternatives to pharmaceuticals. Remember to talk with your doctor before changing a medical routine or beginning any alternative routine.