Here’s a simple trick you could use. Would you do it in person?Let’s say a buyer is browsing in your store and also you see her pick up a pair of sunglasses, try them on, check the price ticket, and set them go into reverse. You might walk over to tell her that they’re on sale, or that you have an alternative color in the back, or to share a cool story concerning the brand—each of those interactions add anything for her, and she might even welcome them. But if you follow her around the store going, “Did you forget those sun shades?Are you sure you don’t want those sunglasses?What about now?” you’ll lose a buyer.