One of my best decisions in New York city was to attend as many tours I could. I got to the following: (1) SoHo, Little Italy and Chinatown (2) Lower Manhattan (3) Harlem Tour (4) Greenwich Village (5) Brooklyn Heights (6) Midtown Manhattan (7) Central Park.
Two guides, Renee & John, where in charge of 5 of the 7 and they are just excellent guides.
All the guides do a very good job walking us through the city and giving interesting facts and some up-to-date info about what to do next, plus some "gossip" (like which celebrity lives in the building in front us).
If you own or manage Free Tours by Foot, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.