U need eat fruits and vegetables ,avoid fast-food, u can to practise sport , dress thick clothes when is cold weather,
If you want to be healthy you should first of all: eat healthy organic food, fruits, vegetables, since the products sold in supermarkets are not always fresh. Secondly, you should spend 30 minutes a day outdoors. Sport is very important thing too. Thanks to him you can stay healty and slim. You also have to wear clothes depends of Temperature.