Some things that help me is forcing myself into the shower. Sometimes standing in a nice hot shower and washing my hair really helps me feel human instead of like a big blob of nothingness.

I also like the sunshine idea. If you don't get outside very much, your body starts to freak out even if you don't realize it. Go for a short walk in the sun if you can. Getting out and moving is helpful. You may not feel like doing it but forcing yourself to do it, you'll realize after that you feel better.