Planning your meals in advance will help you to avoid regressing towards unclean habits. It will also help ensure that you’re getting plenty of nutrients and may even save you money. For example, plan your breakfasts to help start off your day on the right foot. If you don’t have lunch meetings, packing a clean and unprocessed lunch can help you avoid buying unhealthy fast foods. If you do have a lunch meeting, order the least processed and most natural food on the menu. Salads are a good and clean choice. No person is perfect and sometimes you crave unhealthy foods. Allow yourself occasional cheat days to enjoy junk food or foods you wouldn’t normally eat on your plan.  There is increasing evidence that allowing yourself to cheat occasionally and consciously will help you maintain your diet in the long run because you’re not denying yourself anything.  You may even find you don’t eat unclean foods as often when you’re eating a clean diet. Never berate yourself or let mistakes or cheat days derail your overall healthy habits. Setbacks are normal. Eating out can cause a major setback for many people’s otherwise clean diets because of processed, high fat and calorie dishes. Consciously avoiding certain foods and making good choices at restaurants can help you reinforce your good eating habits.  Avoid unclean pitfalls like breadbaskets, fried foods, or dishes in heavy sauces such as fettuccine alfredo. Salads or steamed vegetables and steaks are good choices of minimally processed, clean foods. Avoid buffets, which are often filled with unhealthy and processed food choices and can encourage you to overeat.  Have whole fruits for dessert, which are healthy and clean.

TL;DR in Vietnamese:
Lên kế hoạch cho bữa ăn một cách thường xuyên và đều đặn. Cho phép bản thân có một vài ngày thoải mái. Ăn sạch ở nhà hàng.