Most of the weight problems can be associated with poor diet. Calories in, calories out is an inaccurate method to determine whether or not your diet is appropriate. The only way to effectively control your weight gain or induce weight loss is to control the proportion of macronutrient in your diet. Carbohydrate is the most important factor which can make you fat and reduce your insulin sensitivity. This particular kind of macronutrient should be controlled and if you are planning on reducing your weight, might I suggest you reduce your carbohydrate intake per day, maybe maximum 50-80g of carbohydrate. Proper macronutrient control and exercises combined can give you a great result within 1-2 months, some people were reported to achieve results in 2 weeks. Good luck.