Maintaining proper tire pressure improves gas mileage and the lifespan of your tires, and also cuts down on the likelihood of a blowout or the unexpected flat that may leave you stranded. The Viair 85P is a small 12-volt portable air compressor with a built-in LED work light that lets you inflate your vehicle’s tires quickly and quietly by simply plugging it into your vehicle’s power port (cigarette lighter adapter). It’s small enough to keep in your trunk, and features a 10-foot cord, a built-in pressure guage, and a max working pressure of 60psi. It averages 4.5 out of 5 stars from over 1,300 people (read reviews). Currently discounted 46% off its list price of $69.93, putting it at just $38. See it now on Amazon.