Dream Theater - Space-Dye Vest
Tool - Disposition
Metallica - Unforgiven
Opeth - Windowpane
Aphex Twin - anything from the Selected Ambient Works albums
Aphex Twin - anything from the Analord albums
Porcupine Tree - Arriving Somewhere But Not Here
Queens of the Stone Age - Go With the Flow
A Perfect Circle - 3 Libras
Led Zeppelin - No Quarter
Pink Floyd - Dark Side of the Moon album (though the begining of Time may wake you up)
Pink Floyd - The Wall album
Nirvana - Unplugged album
Detsl - Moscow (may also be named Moskva) Warning: Crappy Russian Rap, but really chill
Anything by Bob Marley
Any type of smooth jazz
Any light classical stuff, mainly stuff that's played in minor
That's pretty much my general list, some of the songs are good and some are bad, but all are pretty chill and good for going to sleep.