The first thing that you must do in order to maintain your current weight is pretty simple! You just drink eight glasses of water daily and walk for twenty minutes in the morning. Not very difficult. And remember calories aren't the key to everything, the quality of your intake calories matters the most! If you eat for example pasta with minced you will take about 600 calories, about the same calories to a large chocolate. But the quality of those calories are complitely different! The carbs can be metabolized more easily than pure fat. So beware, size doesn't always matters!