One of the best ways to see New York is by Subway (Metro) and buses. If you know what you want to see and want to fit right in like a local, then we recommend this. Even if not using the subway or surface buses, the official web site of the Metro Transportation Authority contains a wealth of information, prices, schedules, and more.
Virtually every hotel in New York has either a tour desk, a concierge, or a rack with brochures on what to see.
City Sights NY is a very large and respected tour operator. One of the questions frequently asked is that the tour companies require a printed voucher. This can be difficult if you are a tourist in a hotel. City Sights NY will accept your tour confirmation number (sent in an email) and a valid ID card to prove your identity.