Bizarrely I listen to Alphawaves http://itunes.apple.com/be/app/alphamind-alpha-brainwave/id347396908?mt=8 http://itunes.apple.com/be/app/alphamind-alpha-brain

Bizarrely I listen to Alphawaves http://itunes.apple.com/be/app/alphamind-alpha-brainwave/id347396908?mt=8 http://itunes.apple.com/be/app/alphamind-alpha-brainwave/id3... It keeps me really focused for extended periods.