There are several ways to discipline yourself not to eat. 1. start by setting realistic goals for yourself. set a specific time for when you will and won't eat, and stick to it. 2. find an alternative activity to replace eating. when you feel the urge to eat, try going for a walk, reading a book, or calling a friend. 3. avoid tempting foods. if you know that a certain type of food will be difficult for you to resist, avoid buying it or having it in your home. 4. keep a food journal. recording what you eat and when can help you identify patterns in your eating habits, and make it easier to recognize when you are feeling the urge to eat unnecessarily. 5. reward yourself. set goals for yourself and reward yourself when you’ve successfully reached them. this will help motivate you to keep going.