If imitation is the sincerest form of flattery, we’ve got three months’ worth of ways for you to flatter your fellow retailers. Here’s how they get through the most wonderful (and stressful!) time of the year. Plus: gift-box–ready rings, earrings, pendanWe know how tough it is to come up with original ideas for the holidays. At home, you can hang some twinkle lights, bake a few batches of sugar cookies, crank up the Bing Crosby, and voilà! Instant holiday amibience. Alas, your customers aren’t as easily entertained as your family.That’s why we asked retailers all across the count