To master Tokyo life,you should try to use Yamanote-line of JR-East.
There are a lot of populer stations you've heard Shibuya,Shinjuku,Akihabara and so on.
Many people upload movies to YouTube about Yamanote-Line.

http://s-ohtsuki.sakura.ne.jp/jr/yamanote/newpage00.htm

http://www.youtube.com/view_play_list?p=8B306B62E0955A4E
http://zapanet.info/new/douga/?keyword=%E5%B1%B1%E6%89%8B%E7%B7%9A
Akihabara=秋葉原
Ikebukuro=池袋
Shinjuku=新宿
Shibuya=渋谷
Shinagawa=品川

Many things begin in April.
For example,the train which I use every day to commute Tokyo got crowded
with the new recruits.
Every year new recruits of the year are assembled near Tokyo to educate
how to implement their work.

Japan Productivity Center For Socio-Economic Development classify the
recruits of this year into "cluster of curler "because of their tendency of their
thinking & behavior.
Details is written below.
http://activity.jpc-sed.or.jp/detail/lrw/activity000857.html

In May recruits will be sent each directions for on-the-job training,so that trains wil be not crowded.

March is symbolic of separation, because March is the end of year in Japan.
After the graduation,people proceed in each direction.
Every time March comes,I remember one of my freind of my school days.
He wanted to be "Art motortruck driver".

I introduce the site posting a lot of artistic pictures of Art-Truck.
http://hccweb1.bai.ne.jp/~hcj52101/in10.html