Think about why you want to quit eating junk food. Once you have considered the damage that eating junk food can do to your body and the risks it can pose to your health, you should think about why you want to quit eating junk food. Maybe you are concerned about your weight and want to make a big change to get to a healthy weight. Or maybe you are an avid athlete and you want to improve your performance by putting better fuel into your body. No matter what your reason is, it is a good idea to really think about it.