Well the idea worked. I had a couple of evenings free and got some solid practice in instead of vegetating in front of the TV. The only problem I had was that my old MP3 player has no repeat function and the buttons are a bit dodgy so I found myself slightly annoyed by it. You can pick up a 1GB 'stick' MP3 player for a pittance so I may do so.
My next hurdle is to take it into work and use it effectively there. I'm not quite sure where I'd go to practice. We tend to have a bunch of meeting rooms free in the building so I may just wander round until I find one.