"Treat treats as treats."
Special occasion foods are one of the great pleasures in life, and we shouldn't deprive ourselves completely from them. However, the problem with them has become that these foods are now easily available as daily occasion foods. Our great grandparents probably enjoyed fried chicken, but they didn't swing by Sonic every day to pick up some nuggets on their way to their kid's baseball practice. The trouble that it took to prepare homemade fried chicken meant that it was usually reserved for special occasions. It's okay to indulge every now and then, but a good rule of thumb is to prepare your special occasion foods yourself. Making the process of getting treats a bit more time consuming means that you probably won't make the choice to have them quite as often.
All the tips given for the 28 Days of Real Food Challenge were compiled from "Food Rules", by Michael Pollan.