The coke commercial...made me want a coke. :P
I liked learning about "libertarian paternalism"-- influence behavior while preserving choice. It's something McDonald's discovered decades ago. If you say "You want fries with that?" everyone will agree. So they trained cafeteria workers to say "Do you want an apple with that?" and increased 1) the amount of apples taken, 2) the number of apples eaten, and 3) the amount of each apple eaten. (It was fruit, not just apples.)

Presumably increasing the amount of apples eaten decreases the amount of junk food eaten. But even if it doesn't, I believe--contrary to what many people believe--the junk food really is less unhealthy if it is eaten with something healthy. Not that they cancel each other out exactly. But the glycemic index is a factor of all the food, and the healthy food pulls the GI down while the junk food pulls it up. Attenuating the insulin surges & crashes is at least as important--if not more important-- than focusing solely on the absolute number of calories consumed.