my boss is kind of strict about radios.
he doesn't want them on durring hours of service, which i understand because they can be distracting to some, and can make it so your co-workers can't hear you calling out things.
if we're prepping, or we're slow, then its usually ok at low volumes.
i'm a musician, and music is my first love (cooking a close second, but a much better career choice for me), so i'd give anything to be able to have one of those i-pod dockable boom boxes at my station, but that'll never happen. other wise i'd say that.
as far as the tools go, i think we'd all be lost with out side towls and cutting boards, so those don't count.
for me, its the glass rack that i put between my prep table, and my cutting board. it elevates my cutting board like 8 inches off the table.
i'm 6ft 3, so it makes it so my back doesn't have to suffer from hunching over to comfortably do my prep for the day.