I've fallen back on this periodically, although I must say that getting out of the grocery business ranked right up there with getting out of the army as one of the happier experiences of my life.
“I'm aware now over the last 5 or 10 years that when you do an accent, you really have to kind of get down to the nitty gritty and go into the phonetics of it, if necessary. Find out not just the sounds but the rhythms and the music - or lack thereof - in a particular accent.”