Re: During the meanwhile ...
That's why mine is set to a female voice :). Easier to ignore when I think it's not quite as clued up as it ought to be, which has to do with my habit of finding alternative routes.
Although I use a satnav to find a place, if I drive a route the next time I put in variations where possible. The result is that my brain starts mapping out where I am, and eventually develop a feeling for what is an actual alternative route, or where you're about to get yourself into trouble.
I also use maps (or zoom out on a proposed route if it's electronic) so road signs still tell me something and I can see if there's something interesting I'm about to pass. Maps give you the big picture, a GPS only gives you tunnel vision on your destination.
Maybe it's the industry I am in, but I like having alternatives and fallback options. Not a fan of a single point of failure..