Do live in one of the many cities that have subways? These include: Philadelphia, New York, Chicago, Boston, Washington D.C, Los Angeles, St. Louis, Baltimore, Miami, Atlanta, Cleveland, San Francisco, and more...
Well, if you do, there are some rules a civilized man must follow.
1) Let people get off first
Almost everyday I see assholes, male and female, pushing past people trying to get on the subway.
2) Don't block the door
There is always that big guy, standing right in front of the door. He might as well wear a sign on his forehead that says "I'm an asshole". So, don't be that guy.
3) Don't stare
Most people are probably guilty of this one... it is impolite to stare. You might be staring at the hot chick, or the ugliest person you've ever seen... but either way it is rude.
4) Give up your seat if someone needs it
It is absolutely astounding how often you see an elderly or disabled person get on a subway and nobody moves their fat ass to give this person a seat. When I was young, my Father drilled this rule into my head. He even encouraged me to give up my seat to any women who might want it, so for a while I stopped even bothering to sit down! Anyway, if an elderly person steps on to the train, you should be the first person to stand up and offer your seat.
5) Keep your music to yourself
Be it an ipod, iphone, walkman, nintendo, psp, whatever... keep it to yourself. Nobody around you wants to hear your music or your video game. They especially don't want to hear you singing along...