The first thing to do when you get to Rocky point is realize you are in a different country, yes, we know you only drove a few hours but when you cross the border and enter Mexico you will encounter  that there are different laws and also cultural differences. There are several signs not to bring any weapons of ammunition as this is illegal in Mexico to carry any weapons, speed limits are a bit slower specially in the towns, be careful driving through Sonoyta, it's easy to speed and getting a ticket will only slow you down! However if you do get stopped by a police don't be alarmed if they ask you to go to the police station, this is the normal procedure to handle a ticket since they can't enforce it otherwise with foreign license plates, you follow the officer to the police station, pay for your ticket (usually 20 US for a regular speeding ticket) and then you get to go about your normal business, the ticket won't affect your insurance or go into your driving record. Streets are not marked in many cases and you have to be careful at intersections as some people will not stop at designated stop signs, drive slowly and carefully, common sense is also a must: Don't drink and drive, it's not Ok and you endanger yourself and others! Use extra Caution: there are many tourists who don't know the streets well, sometimes a street will change abruptly, a speed bump will not be marked or there will be a hazard int he road, just remember to be extra careful as signs and street conditions are not what you are used to. 
 Also we hope you came down for a wonderful vacation and your normal pace has already slowed down, if you are on a business trip realize Rocky Point will handle your business much slower than you are accustomed, from ordering in a restaurant to getting to the point in a business meeting it's all going to be at a different pace, everyone in town has time to chat, the restaurant owner may stop by your table and make sure everything is good plus stay for a while to chat with you, the neighbor in your beach rental may also want to stop and meet you and talk in general forget the big busy city and welcome the relaxed atmosphere in which time is abundant and there is always tomorrow, dinner is a social event, the breezy beach will relax you and you will soon welcome this different way of life.
Tips, tips and more tips: Mexico is a country in which many people live off tips, at the grocery store the people who bag groceries don't get paid, it is customary to give them a tip, it can be 20 cents or a dollar anything makes a difference to them, and save some change for the person at the parking taking care of your car, they are also volunteers without salary, we know the car wont go anywhere without you but they still need a small tip, carry change with you, gas stations are full service and the attendants  also need a tip, their wages are minimal and they count on the tips to support their families, if you want to do more than tip bring some extra clothes you no longer wear or food that hasn't been used in your pantry for a while, there are plenty of needy people and charities that will be more than happy with your used clothes or extra food.
Bring a great attitude and generosity with you, Leave only Tracks behind and Come Back Often!