New York Subway and Buses

Metropolitan Transportation Authority (MTA) website
Subway map
Manhattan bus map (pdf)
MTA Trip planner (subway & bus directions from one address to another)
NYSubway.com

Travel to/from airports

John F. Kennedy International Airport (JFK)
NYSubway.com travel guide
MTA Airtrain to JFK info

LaGuardia Airport (LGA)
NYSubway.com travel guide

Newark Liberty Airport (EWR)
NY Subway.com travel guide

Hotel

Driving directions