Derek and the Dominos -
Layla
Just some great Classic Rock to help me fall asleep. Fun fact, while often credited to just Eric Clapton (as in, his solo career), it actually comes from a band that he formed called Derek and the Dominos, a band which only has one album under its name. Duane Allman, one of the greatest guitar players of all time (alongside Clapton himself, of course), does guitar work on the album and this song.
OK I'll stop nerding out now and just post the song.