Just landed in Japan. First thing to do is exchange the voucher for the Japan Rail Pass.
The JR office is in the lower level . Take vouchers and passports and fill and application there. The office has a Red sign . It was very easy to find. They gave me my Japann Railpass card and also booked my seat for the Narita Express.
After that , I exchanged some money, but money rate was very low 103 yen per dollar. If someone knows where else to exchange money in Japan, please let me know because it was kind of difficult.
Now Iam taking the Narita express which will take me to Shinjuku. The Narita Express is located in the lower level of the airport. One level lower than the JR east office. There are lot of signs so dont worry, you wont get lost.
From Narita to Shinjuku it takes one hour and a half aprox.