I usually fall asleep to "Wish You Were Here" by Pink Floyd. Protip: Don't fall asleep to "Comfortably Numb", or any track on The Wall for that matter, or you'll have some very interesting dreams.
Well for your information...
The Wall is my favourite album and I have fallen asleep to it many times (Especially Run Like Hell) and have had normal....... okay I admit VERY strange dreams.
The guitar solo in Comfortably Numb is what I fall asleep to and wake up to every day though. I think I'm pretty normal, but my friends think that has messed me up in a way.
I once had a dream that I was at a Pink Floyd concert and they were playing the Wall straight through and it was the best moment of my dream life... (The crazy thing is that a few days later I found out that Roger Waters (best Pink Floyd member) was going on tour with The Wall... I'm not sure if it was fate, or what, but I did see the same concert I dreamed about.
So yeah now that the meaningless rant about nothing is over... Like I said, COMFORTABLY NUMB!!!! My favourite song to fall asleep to, (not saying it's boring or anything) wake up to, chillax to, and just plain LISTEN to.