Has the NYC transit strike made it hard for you to get around? You might consider hopping on a bike. Days of leisure has an emergency bike riding how-to that might help.
Even though it's 22 degrees right now (8:33 EST), this is not a crazy suggestion. In many of the colder parts of the world, people commute by bicycle all year round. If you would consider walking in weather like this, riding a bicycle is not that different.
How to commute by bicycle, all of a sudden [days of leisure]