I've had carpet in every room I've sewn in for 40 years. I keep an extension magnet handy to pick up pins, but it doesn't always work. I wear a pair of slip-on style sandals around the house and just make sure I don't have bare feet in my sewing room. If I do leave a pin DH seems to be the one who finds it! Just count your pins at your design wall, and watch for dropped pins everywhere. Pretty soon it will be second nature and you won't drop many.