To buy: $10; amazon.com. Using the non-skid pads is as simple as you’d imagine: Simply peel off the stickers, and tack them onto the bottom of your flats, heels, or loafers. The stickers have a rough exterior that grips the ground without damaging your precious flooring, so you don’t have to worry about wearing them on wood or marble surfaces. If you want to avoid the pads from standing out, they even come in multiple colors (like beige, red, black, and white) that you can grab to match the bottom of your shoes. It’s truly a “great way to add more traction to a shoe,” wrote a reviewer who ordered these stickers for tennis shoes that had no traction at all. They continued and called the pads a “lifesaver,” adding that the non-skid stickers stay on nicely and turned “two worthless and dangerous pairs of shoes” into ones that they could wear enjoyably. Another said that the pads “saved” their sandals that were so slick on the bottom, they became dangerous to wear. “It was easy to trim these to the exact size and shape I needed,” the shopper explained. “They adhere firmly, are thin enough that I don’t notice any difference in the weight of the sandals, and they don’t slip at all.”