When you make bad lifestyle choices about diet, exercise and stress, you are making a holistic decision. You cannot isolate your choices from your body. Become more aware and accepting of your body. Make connections through sensations and feelings; bring to the surface of our awareness what has been blocked and rejected.
Before acting on a habit, pause. Ask yourself how you feel. Propose to yourself that other choices exist. Habits are broken by stopping the automatic reflex and injecting new questions, from which new choices arise.