What you describe is a classic symptom of depression for me. I can look at something everyday that is bothering me and not do a dam thing about it. Then just feel more ashamed of myself for not doing it.

I don't have the energy or motivation but in reality I could probably come up with the energy to take a small step. Like maybe take one scoop out of the litter box and then an hour later take another scoop. I can end up with 10 things going on that are not complete but eventually one or two of them will end up done by me just doing one tiny thing at a time. One scoop each day and on one of those days I say what the hell I will just clean it all and be done with it. Then I feel really good about myself. Not always able to do this but it sure helps to approach it that way when I can.