Well I recomend only eating when your body is hungry, and stop eating when your body is full. Get exercise and be active. Take a walk everyday, go jogging, play a sport, or something else active that you enjoy doing.
What not to do is stop eating or only eat sugars (carbs) or fats. Make sure you are getting at least 1500 calories a day (or more up to 2200).
To control junk food cravings, replace that junk food with healthier (but still delicious) options. Like carrots, an apple, pretzels, raisens, other dried fruits, ect.