One of the discipline I have for myself is choosing right food. I make a conscious effort to eat low-calorie foods. Avoid eating fast food on a regular basis as its high fat content will  only end up on the belly, hips and butt and eventually put your heart in danger. Switch to high-fiber and whole grain foods- they keep you fuller for a longer period of time and are great at keeping your body in top shape. I always see to it that I remain healthy and maintain my body weight.