Anyone who drives a car in the United States is experiencing more than a little anxiety over the dramatic rise in gas prices over even the past month. Your grandparents, your parents, and some of you elders of the LockerGnome community can probably remember the days of filling up the car's tank with spare change and thinking nothing of driving a car that was the size of a house and only got about two miles to the gallon. Petroleum seemed to be a never-ending resource back then (but, to be fair, dinosaurs still walked the planet, so it was still being made). Now, most of us can't afford to be so nonchalant about our habits of conspicuous consumption. If you simply have no alternative to driving, you may want to learn how to use your iPhone to find cheaper gas.