Do you feel like getting off the couch? I sometimes just sit and groom while watching tv if I know I have someplace to go but just want to sink into the couch until it's time to go. Filing nails, plucking eyebrows, nose hairs, anything that takes time and you haven't done in a while.
If you do feel like getting off the couch, go outside for a couple minutes. That might inspire you to do something. I feel like crap, I go outside and start to see all the pine needles and dog poop I need to clean up and I just start doing it. Not saying I finish it, but I start and I kill some time. And it's a mindless thing to do. Doesn't take hardly any concentration at all.