I find that when I've been working late my mind is a mess of racing thoughts and it's impossible to get to sleep quickly. What I have been doing lately is list

I find that when I've been working late my mind is a mess of racing thoughts and it's impossible to get to sleep quickly. What I have been doing lately is listening to audiobooks, which really help to prevent my thoughts from jumping around. My books of choice have been the Harry Potter series (the ones read by Stephen Fry, of course) - his voice is really soothing, and the books are (generally) not too loud, or varying in volume. I find that generally I fall asleep within about 10-15 minutes of starting. The worst thing is that I struggle to get to sleep without it now.