If I have other at home, I ask for help. Young eyes usually spot it before I move. If I am alone, I carefully check myself before moving and then I check the floor around where I was sitting. If I don't see it, I get out the flashlight and my big magnet and go over the area. If I still can't find it, I put a pantyhose knee high over the vacuum end and try to pick it up that way. If that fails, I put on the power room and vacuum the heck out of the whole area and warn everyone that there might be a needle in the sewing room. This is one of the reasons I only sew in my sewing room because I don't want to take a chance of losing one in other areas of the house.