No music. No rituals. At home I write in my office or on the laptop in the kitchen where our puppy likes to sleep, and I love his company. But I've trained myself to be able to work anywhere, and I write on trains, planes, in automobiles (if I'm not the driver), airports, hotel rooms. I travel often. If I couldn't write wherever I was I would get little done. I also can write in short bursts. Fifteen minutes are enough to move a story forward.
