Dining out may be a rare treat for some and a regular habit for others. In either case, if you decide to try the ketogenic diet, you'll probably limit your trips to your favorite fast-food restaurant's drive-through. However, this does not mean you cannot indulge once in a while. Changing your dietary habits drastically is usually the source of most failed diets. In a short period, your body does not have time to adjust to the change, leading you to revert to old habits as soon as possible.