Although I don't use music as a tool for relaxation, even though I love music and it's often part of the whole ritual, there are some songs that never fail to be relaxing. I'm listening to one of them right now, The Doors' Riders On The Storm. It's not exactly uplifting material, but the sound of rain in it - just like the sound of rain on pavements and the wash of car tires through it - is very soothing to me. My best relaxation tool most of the time, is just being left alone, doing nothing, to calm down in my own time.