I've been doing a lot of think time tasks recently, which means I put in headphones; rock out and write/code etc.
The problem with listening to music through your PC is you often cause a BEEP when typing like an invalid keystroke etc.
Its super annoying and hurts my ears.
Andrew Connell has a great article (oldschool from 2006) on telling your computer to shut up!
this will kill it for ever
So... what OTHER "hidden" services are there?