31. RSVP
This literally translates to please respond. It's a nightmare to organize large-scale events even when you know exactly who's coming, so don't make things harder by leaving your host to wonder whether your invite got lost in the mail.
32. Call back.
You wouldn't just walk away from someone who tried to start a conversation with you in real life, would you?
33. Go with the flow.
There's nothing more annoying than a huge line of people walking at a glacial pace – except maybe people who stop dead in the middle of the sidewalk to take selfies or check their text messages. So keep moving and everything will be just fine.
