I knew this guy once,,,,,
He used to get high during the afternoon and watch soaps. Then scream at the tv. But then after he chilled out and got some munchies he'd take pen to paper and use whatever he just saw as his muse.
Christopher Cross (sailing, arthur's theme) once remarked that (not the gettting high) was the method he used predominately in song writing.
As for listening to music from all sorts of places. I'm a terrible boyfriend just ask any ex. When the television is on I have guitar in hand and I'll rerun the commercial trying to figure out the song.