3 ways to improve your overall health +in quotations are an example of what you could say.
Exercise: "Exercise is important because your physical health depends greatly on the physical fitness of your body and how you take care of yourself. Daily exercise decreases the chances of diabetes type 2 and other diseases."
Diet: "Eating healthy is an important part of everyday life, eating an adequate amount of food every day is important to your health just as much as ensuring that the foods you eat are not foods that can harm you physically, such as junk foods and such."
Mental Health: "Believe it or not, your mental health has a great effect on your physical health, and it is just as important that you take care of yourself mentally as it is to take care of your physical health. Getting a good amount of sleep (7-9 hours of sleep) is very important to your mental and physical health. Taking care of yourself mentally and not pushing yourself too hard is also important. Ensuring that your mental state is healthy is a must."