I have a list on my whiteboard, left over from the days I decided to stop writing and just let the air in. It is a list of things that remind me of the mood I'm trying to evoke in my novel. Here it is:
Nick Cave ballads
Be Good Tanyas
Long Black Veil
cabinets of curiosities
Renee-Louise Carafice (added August 7)
Out of these things a novel has risen. I recommend the exercise. If anyone else cares to share a similar list, please do.