Take It Easy. Unless you are excited to be following a very specific diet and exercise plan, do not try and change too much too fast. If you have been eating poorly and not exercising, both your body and your mind will have a lot of adjusting to do. If you try and change everything too quickly the odds are greater that you will feel bad, get discouraged, and give up. So be patient. A time will come when a healthy snack will taste as good as the junk food you felt bad about eating, and you will look forward to your regular exercise.