I'm getting a Metro Card for $25.00 that allows you to ride the busses and subways for 7 days.
I hope to make it to the American Museum of Natural History, The Metropolitan Museum of Art, MoMA | The Museum of Modern Art the Top of the Rock and The United Nations.
The place I'm staying looks like a good location - it's a block from Union Square so I can hop on the subway easily, check out Union Square Park and the greenmarket and make it down to Washington Square Park to get some eats from the Dosa Man.