"Eat all the junk food you want, as long as you cook it yourself."
Formerly expensive and hard to make treats are now cheap and easily available, turning special occasion treats into daily food items. The french fry didn't become America's most popular "vegetable" until industry took over the jobs of washing, peeling, cutting, frying, and cleaning up the mess for us. If you still had to make your own french fries, you'd probably eat them far less frequently because they're so much work! The same holds true for fried chicken, chips, cakes, pies and ice cream. Eat them as often as you'd like- but make them yourself! Chances are that you won't eat them very often.
All the tips given for the 28 Days of Real Food Challenge were compiled from "Food Rules", by Michael Pollan.