Cord holders made me think of something. I made cord covers for the dining room. I had long unsightly extension cords around the room for the lamp and lights in the fake tree. I then made one for the hall when I put lights on the bannister year round. It looks so much nicer than the cords and was super simple to make. Just cut a piece of fabric 1 1/2 to 2x longer than the cord and wider than needed to go over the plug. Hem the ends and sew the long seam and you're done.