What to do if i want to lose weight so what are some foods i should not eat and food i should start eating?

Less food!: The most important issues are reducing your intake of food and increasing the amount of exercise. It would help to reduce intake of saturated fats, refined sugars and processed foods. Have diet rich in fresh vegetables, fruits, whole grains and low fat milk products and less of every type of food. See this site for more info. http://www.webmd.com/diet/default.htm.