Admit it: When you saw the puny touchscreen iPod Nano you thought, “That could make a cool watch.” Accessory makers thought so, too, and a handful of them are already selling fancy straps to turn your iPod Nano into a watch. The truth is you don’t really need to waste money on any of them, because you can do it yourself in two steps. Really all you need is any fabric strap. The iPod Nano has a built-in clip on the back so you can just clip it on to the center of any thin strap.