After living in Miami Beach for 7 years, I have some etiquette advice for those who live here.
1. Stop lights and stop signs mean just that: STOP! If you are going to make a right on red, come to a complete stop first. And, while we are at it, let's consider advice #2....
2. Pedestrians have the right of way. If you are making a right on red, you have to yield to the pedestrian in the crosswalk. And, if the crosswalk is not protected by a light and is merely striped on the street, the pedestrian ALWAYS has the right of way.
3. Nobody wants to be around your children after midnight. This is adult time. Take them home and put them to bed. At all other times, be the parent... Don't let them run around restaurants and disturb other diners, etc.
4. When walking on a sidewalk, pass oncoming walkers on the right. If you are holding your sweetheart's hand, that doesn't give you the right to hog the entire sidewalk. Drop the hand, walk single file for 10 seconds, it won't kill you.
5. Smile, say "please" and "thank-you". You'd be surprised how doing these things will actually reward you with the same. It doesn't happen every time but it makes someone else's day nicer and that makes everyone's day nicer in the long run.
6. Don't honk your horn because the person in front of you can't move.
7. That little stick on the right side of your steering wheel is called a "turn signal". Learn how to use it.
8. 95 is the name of the Interstate, it's not the speed limit.
9. If you make an appointment at a business, show up on time.
10. If you are in the service industry and make an appointment to do work at someone's house or business, show up on time.
11. Don't snap your fingers at service industry personnel. They are people too! They are not your servants or slaves.
12. Don't scream and yell at people to make your point. It's more likely to make you NOT get what you want and it annoys everyone else around you.
13. Don't show up to the post office with a plastic garbage bag of stuff and say you want to mail it. Get a box, pack it, tape and addresss it before getting in line. (believe it or not, I have seen this happen more than once)
Miami is a lovely place, rich with natural beauty and amazing diversity in culture. Some simple modifications in behavior would go long way in making it the uber-fantastic place it can be.