Turn signal: You're in a strange city heading for a photo spot you've heard about, but you've gotten lost. Maybe you came out of the subway and can't orient your street map to the signs, or you can't understand the language. And amid high-rises, or at night, you can't use the sun for navigation. The solution? A compass! You'll reach your target without breaking a sweat. I rarely need one when I'm backpacking in the wilderness, but put me in a big city and I get hopelessly lost without my guiding magnetic needle. Whether you're in a major metropolis or the great outdoors, a compass provides another benefit: It shows you where the sun will be at various times of the day. Outdoor stores sell a variety of compasses (Silva and Suunto are old reliable brands) but really, any cheap, compact compass will do.