Waiting for my Muse

This past summer I thought a good subject for winter paintings would be interiors. So far this is the only interior sketch I have, and I did this a couple of years ago for a drawing class I was teaching. I was going to carry my camera and sketchbook around getting references of doorways, views into the next room etc. It still seems like a good idea to me, but I have been feeling so uncreative. What is it they say about picking up the paintbrush and the muse will appear? I don't think the muse ever walks in and hands you a paintbrush.
I'm gonna leave the door unlocked just in case.