War Driving is the practice of finding unsecured wireless (WIFI) networks that you can “steal” bandwidth from to surf the net, talk via VOIP, download email, post pictures, comments, tweets, etc. There are handheld devices made specifically for “sniffing out” unsecured WIFI connections, but you can do the same thing by driving around with a laptop in your car.

FRS (Family Radio Service) & GMRS (General Mobile Radio Service) Radios are a cheap, easy backup for cell phones.

Short Wave, MURS, VHF, UHF, Wired Radios and Repeater Radios are a HUGE topic. Suffice it to say that they can be powered from car batteries, made portable, and short wave can even communicate half way around the world. All of
these are GREAT survival communication tools, but they all take much more time and research to make a decision on than FRS and GMRS.