What can I do to be healthy?

Our teacher propose us to do the questionnaire: What can I do to be healthy?
I ask you to help me. I know that many people keep the healthy life style. Let's try to add more and more people be healthy. A proactive approach to health involves knowing where you stand for your age and gender in regard to physical health standards.  Yes, 65% of all deaths in adults are caused by heart disease, cancer and stroke. In many cases, these diseases were preventable. Many of the behaviors that cause these diseases begin at a young age. For example, if you use tobacco as a teenager, you're more likely to get heart disease, cancer or stroke when you're an adult.