A taxi from Narita to central Tokyo is rather expensive, so taking the train or a bus are better choices. The JR Narita Express (N'EX) is a direct link to Tokyo Station. The train leaves from the train stations in the basements of terminals 1 and 2. Here is information about ticket choices, prices, etc.
The least expensive way is to take an express bus like the Keisei Bus, only 1,000 yen.
Both the train and the bus will take you to Tokyo Station. From there it's a short taxi ride or about 15 minutes on foot to your hotel.
Catch the N'EX to Tokyo Station. You can buy a ticket from the JR East service counter
The route guide of the service called LIVE JAPAN is convenient.