first choice for for me, gymnopédie no. 1 for sure :-) i love this super slow version of it, too, it's so very peaceful and comforting for me. i would put the song on loop and fade away to this beautiful piece. also, as a bit of a morbid plus, if anyone walked in soon after my action i'd bet that they'd assume i was only having a good nap while listening to some relaxing music.
here's another of my all-time favorites. elliott's voice is always such a comfort for me.