I hear you. I have found the best thing I can do at these times is either distract myself from my negative thoughts, doing something I enjoy, or do something to make you feel good about yourself. For me, doing a small task I have been putting off for a long time usually works. It could be anything, like sorting a bookcase, cleaning my mirrored doors (did that one last night) or anything that you keep saying to yourself that you need to do. I always feel better about myself after and can sit back and enjoy my efforts.
