The last few times I've done yard work I've really enjoyed listening to my mp3 player (the irony is too good to pass up - I'm listening to geeks talk about technical topics while I do manual labor).
The one problem I've had is figuring out the best way to attach the player to me without getting all hung up on wires.
Tonight I finally found a method that worked well.
I simply attached the player to the back of my hat with a thick rubber band.
I found I could maneuver without tripping over myself, and didn't get anything caught in the weed whacker.
The best part is that adjusting the mp3 player simply means taking off my hat - which is much easier than undoing various other contraptions I've tried in the past.