Classical music and an insomniatic head

Debussy's Suite Bergamasque, (Clair De Lune) is soporific in the extreme.

Beethoven's Piano Sonatas are also good, particularly No 14 (Moonlight Sonata) or try Tchaikovsky's Piano Concertos, but some of these are quite heavy.

Try and pick pieces that are written for soft instruments, Harp concertos are good, or any of Rodrigo's Guitar Concerto's, Piano stuff can be very relaxing too.

moonlight sonata is a fucking ace tune, its one of the only ones i like apart from william orbit's addaggio for strings!!!