Zipcar is an awesome service for anyone who either lives in a dense city like New York or who may plan on traveling there. Plan in advance though because you need to first be approved. They send you a “Zipcard” that unlocks the door to the car you reserve. For occasional driving they have a popular plan that is great for first-time users with no monthly commitment. Drive as much or as little as you like, and pay as you go low driving rates (from $9/hr and $83/day). If you live in the city you may have great public transport but need a car sometimes for shopping runs.
Here is a link that will get you started: