As the Holidays approach, thoughts turn to retail. It's a perfect time to see how various department stores, fashion stores and online retailers have done in advertising effectiveness over the last 12 months.  Some retailers, like Kohl's, have consistently good ads (outside of radio), while others (high-end retailers) always bring up the rear. This post explores the best ads across seven media types, analyzing why they work so well out of almost 1450 ads tested in the past year.