GRR_FlyGuy,
I agree that staying at NRT is not where the action is, although you are pretty close to the world's largest (only?) refrigerated indoor ski area. There is a very efficient motor coach system that leaves from the airport and makes stops at major hotels in the city. You check in with the bus desk in the terminal for correct bus route, and pay for the ticket. Also double check the departure tax. Either you can pay it at your hotel at checkout and get a coupon, or you'll need yen to depart.
Have a great time, and remember that even we hicks from GRR can manage to learn some basic travelers' phrases that smooth the way and help keep us from being too Ugly
Lori