If time is short, don’t waste it wandering around. Make your list, of all those things you would like to do, and then pick a third of it to actually accomplish. Work out a plan that includes those things and go through the city in sections. Lower Manhattan one day, Midtown and then Upper Manhattan can fill your last day. Be strategic. A wanderer in New York City will end up eating at Pizza Hut and seeing some generic show or worse yet, a movie, because they failed to plan and no one can decide what to do. You can do that at home! Again, walk as much as you can, it adds the New York experience to everything you do!