When I'm coding, it's usually Oasis or Frank Black and the Catholics. I need more coding CDs, but it's hard to find the ones that work for me. And right now I'm listening to Fiona Apple because I'm feeling cranky. The music really does help. Probably in part because of the actual music I choose, but in part from the creation of a consistent atmosphere for certain tasks.
Location helps too, as does time of day.
We love sameness. I think I'll try an experiment with scent as well. Aroma seems to be a powerful memory trigger and mood enhancer. I could get candles or something to use when I do different thing. It might be hard to pick the scents though.