well thats a good start actually lol, the worst kind is the fashionable kind.
anyway being arrogant just means having a belief (and showing) that you are better than other people
when speaking maybe you are quite self- centered, always focusing on things you do well and can do well. people get the impression others are arrogant when they talk about themselves alot.
also, try and listen to other peoples points of view, and dont just assume your right.
i used to always twist things round to make me right, whatever the situation, and sometimes i think to myself, whats the point in doing this, its only going to make the other person feel stupid and inferior
im alot nicer now!