It can be a real pain to have to stop and sew on a button that came off your clothing--or worse yet, having to go out and buy a matching button which was lost when it came off. To help prevent buttons from coming off in the first place, put a dot of clear nail polish over the thread which is holding on the buttons. Do so before you NEED to. Right when you purchase clothing with buttons, get out your clear nail polish and put on those dots of polish right over the threads even before your first wearing! That way you won't forget!