Ugh I hate that 'I give up' feeling, it leads to so much emptiness and overeating. Sleeping a bit longer sometimes helps me if I can spare the time, as does saying to myself that it's ok to expect less of myself whilst the mood persists. Usually the thing that gets rid of those kinds of feelings is a 'derailing' event; something that changes my routine and forces me to think differently. You can't feel empty if you've got to think about something new.
Of course, knowing that and acting on it are two different things, and I don't always follow my own advice. Especially right now when it's cold and rainy and dark all the time, which naturally narrows my behaviour down because I can't even see the outside world right now...