To get peaceful mind, body and soul...
Adopt the right exercise. This will train your mind and body improving your emotional health. This way you can achieve your desired body weight, flatten your abdominals (tummy), a sound sleep.
Think right, be positive. Do not think on a point or problem whose solution is not in your hand. You can manage your stress by thinking right.
Eat right kind of foods, change your food habits. Your eating habit is very important on teh way you think, the way you look and the way you react on a problem/situation.
Relaxation and meditation. This will calm your mind and give you strength to fight daily stresses.