I...would usually offer my impressive services, but I'm having some, uh, complex issues at the moment that keep me from doing that.
My best advice? Look for a little plastic card, it'll give you an address. Then go out to the edge of the sidewalk and start yelling "cabbie" very loudly. A yellow car will pull over. Get into the back of the car, and tell the driver the address on the card. Do not listen to anyone on the street that says they'll help you. You occasionally will find your streetwalker saints, but most of the time? They're people with guns and they don't want to help you.