Can you plan to do something tomorrow? Go see a movie or go for a walk around a lake or something like that? Basically... Something to do no matter how you feel? I sometimes find that making a plan like that (and sticking to it no matter how I feel) can result in my feeling better by the end of the day. Getting tired out too so that I sleep better that night. Playing tennis with someone? Something where you are likely to have a positive social encounter, get some exercise (endorphins yay and tiredness), and treat yourself.