Personally, I find absolutes like "I will not eat period" or "I will eat only pre-packaged x, y, and z for breakfast, lunch, and dinner, respectively, every day

Personally, I find absolutes like "I will not eat period" or "I will eat only pre-packaged x, y, and z for breakfast, lunch, and dinner, respectively, every day" much easier to follow than more vague calorie-counting rules.