How about some of this?
Sonicaid - Music to Enhance Concentration
http://www.youtube.com/watch?v=usqT8mHRdcM
Sonicaid - Music to Enhance Concentration
http://www.youtube.com/watch?v=usqT8mHRdcM
http://www.youtube.com/watch?v=tE-4VmnOYa0
When you get instroke with that, you will humm it all day long.
Best regards from the old world
Gerhard