People need to know there local laws and current technology before following all the advise in this thread.
Where I live a copy of insurance documents must be in a vehicle at all times. The original must be in a vehicle that leaves the province.
Most cell phones require a password to access them nowadays. If my phone was stolen, they would have three tries to guess my password before the phone locked up completely.
I am not a fan of GPS technology. Why would anyone need to program HOME into one? Surely most people can find their way home from anywhere within 20 or more miles? My phone has a GPS option that I can use if needed to find a shop in an unfamiliar city.