Today is a bit difficult to keep a healthy lifestyle, because the time should be devoted to exercises or healthy food preparation, is used in other activities. But with interest and dedication you can achieve it.
-Eating healthy foods
-Avoid excessive fats, sugar, and alcohol
-No nicotine
-Drink plenty of water
-Exercise.
Healthy food is essential. You are what you eat, so if you eat healthy, you are healthy. Food that is low in fat content is good. Unless that fat is poly-unsaturated, mono-unsaturated, or omega 3. These are some of the good fats. Some of the bad fats are trans and saturated fats.
Low sugar content is another plus. Sucrose is the bad kind of sugar. Glucose is the good kind of sugar.
A variety of food. Fruits and vegetables are high in vitamins and minerals, which you need for a good alimentation.
Also the exercise is a key for a healthy lifestyle as well. Go to the gym every once in a while, or daily. Or take a run around your neighborhood. Even taking your dog for a walk is good. So long as it's routine, about an hour, and is at least moderately active. Helps prevent the disease such as: heart disease, cardio vascular disease, diabetes, and obesity. It also improves mental health, and prevents depression.
It's not easy to go from a couch potato to a healthy person. Don't be discouraged if you satisfy cravings for ice cream, hamburgers, etc. as long as you don't have a steady diet of unhealthy food.
Courage, you can lead a healthy lifestyle.