1. Please don’t stop on the subway stairs.
You might get shoved, elbowed, pushed, or cursed at. People are trying to get to work. They don’t care that you’re suddenly second guessing whether you want to go uptown or downtown. They don’t care if you’re waiting for your friend who can’t get her metro card to swipe and is now stuck at the turnstile madly pushing it over and over through the card reader.