Pollan big advice is to “eat real food, not too much of it, and more plants than meat”.
The rules are short and memorable. How about Pollan’s “Rule #19 – If it came from a plant, eat it; if it was made in a plant, don’t” (most highly processed foods have stuff in them that you’d be better off without). Or “Rule #36 – Don’t eat breakfast cereals that change the color of the milk” (If the food changes the color of the milk, it probably is too highly processed with refined carbs and chemical additives we don’t need). Then there’s “Rule #39 – Eat all the junk food you want as long as you cook it yourself” Consider French Fries – there’s a lot of work to peeling, cutting up and frying potatoes plus cleaning up when you’re done! If you only eat fries that you cook yourself, chances are that you’ll eat them less often.