First of all, the most obvious, get up out of your seat if an obviously elderly, handicapped or over-burdened person looks like they might need a seat. Keeping that in mind, even if someone is not elderly or handicapped, be considerate of those who have been waiting longer than you have at the above ground stops.
Nothing is worse than waiting for 20 minutes and then getting cut-off by a last minute rider who then takes the last seat from you.Don't talk on your cell phone if you don't have to. Even worse, a quiet T is not the perfect place to listen to all the obnoxious midi ring tones you downloaded.

If you are wearing ear buds, do yourself a favor and keep them quiet enough so that your shit doesn't remix with mine.
Listen to the T-drivers. MOVE IN! Don't stand in or by the doorways. Ever. Or the stairs.

Don't bother cramming your body into a crowded train when they announce the doors are closing. Another train is surely 2 minutes behind, and if you actually listened to the drivers you'd know that.
Lastly, don't be oblivious and smack me repeatedly with your trendy shit handbag - especially in the head!
If you do come out of your egocentric bubble and realize that you might have hit me, a simple apology will most likely stop me from fantasizing about dousing your face in hot coffee.
