To be healthy, you can:

Eat a healthy diet: A healthy diet can help you avoid illnesses and is important for all ages and genders. You can limit processed foods and sugar, and eat nourishing foods. 

Exercise regularly: Exercise can improve your eyesight, blood pressure, lean muscle, cholesterol, and bone density. You can try to get at least 150 minutes of moderate activity per week. 

Get enough sleep: Sleep is an important biological process that keeps your body and mind healthy. 

Stay hydrated: Drinking water helps detoxify your body and filter out unwanted particles. 

Limit stress: While some stress can be good, too much stress can make you sick. 

Moderate alcohol intake: A Harvard Medical School study found that moderate alcohol intake, which is generally one drink per day, can increase your lifespan. 

Take a multivitamin: Taking a multivitamin can help you be healthier. 

Get  health checkups: Getting health checkups can help you be healthier.