Black Lung - Prozac parade
Coil - Where Are You (almost anything by Coil would qualify, really)
Explosions in the Sky - [can't really decide on a specific track, but a lot]
Jarboe - Lavender Girl
Katatonia - Brave/Deadhouse/For Funerals To Come/Chrome
Led Zeppelin - Stairway to Heaven (cliche, I know, but it still has an effect on me)
October Tide - 12 Days of Rain
Paatos - Tea
Portishead - Mysterons
Porcupine Tree - Stop Swimming
Steve von Till - My Work Is Done
Swans - Telepathy/In The Eyes of Nature
The Cure - The Last Day of Summer/One Hundred Years (lots of songs really)
VNV Nation - Carbon