1. Puerto rico is most definitely on island time. If you're hungry, don't expect to eat right away....anywhere. It can take 20 minutes just to get drinks to your table so go before you're famished and start getting irritated and crabby.
2. Driving in Puerto Rico is pretty crazy. People do not use turning signals, stop signs, lights. So be prepared. The cab drivers are obviously used to this so expect some gasping, holding on tight, and prayers if you will be doing much traveling around.
3. Despite the wild roads, if you plan on taking many day trips: rent a car! They may only be $30/day so if you're planning to go to El Yunque, bioluminescent bay, Culebra, Vieques, etc. you will save a good deal of money. Travel from Isla Verde to the ferry in Fajardo is $80-90 one way for a 45 minute trip which leads to the next topic.
4. Flamenco beach on the island of Culebra is incredibly beautiful. The locals seem to think there's never an issue with catching the ferry from Fajardo to Culebra. So if you're told you wont have an issue or have plenty of time: DO NOT BELIEVE THEM. The tickets for the ferry are available one hour before the ferry departs. So even if you give yourself hours before hand to get in line, it's still very likely you may not get a ticket. You can order them online beforehand allegedly so plan ahead and make sure to do this. The ferry only holds so many people so you may got on one to go over but the same story goes for the other side ao you may not be able to get back. It is a very nerve wracking experience so PRE-ORDER or you may find yourself stuck with no where to go. This can be especially terrifying if you wait until your last day to make this trip and have a flight out the next morning.
5. It is possible to fly to these small islands for about $50 per person. While the flight is a little scary given the size of the plane, the views are incredible and totally worth it. Plus, it is only a 15 minute flight where the ferry can be an hour or two if you manage to get on it.
6. Plaza las americas is incredible. If you enjoy shopping in the slightest bit you dont want to miss this.
7. Things are not cheap in San Juan so dont expect it to be a bargain trip. Cocktails will likely cost you $8-$15 each for mojitos, pina coladas, margaritas, etc. If you want a treat during your day on the beach, grab a coco loco from The Third Base bar and grill. You wont Be ddisappointed. Plus, we were only charged $10 for very delicious, booze-filled coconut. Also, beach chair and umbrella rental seems to be very reasonable down the beach so if you plannef on packing or buying these items for your trip you can probably avoid that expense.