Numero Tres on our useful suggestions or tips list would have to deal with transportation.
If you are living in a city, please learn the public transit - there are buses, taxis, you can walk and even ride a bicycle is most cities in Panama. In some cases those may be the safest and funnest ways to travel (debatable). If you live out in the country, there are still buses that run to most cities, along with buses between cities. These are inexpensive, have storage space and will most likely run in any type of weather.
The pluses about riding public transportation, definitely in the city, is that it cuts down traffic and its inherent pollution, allows the traveler less stress, keeps cars off the road, saves the traveler money, and challenges the traveler to think (which can be a really good thing).
Yes, public transportation may have some unreliable tendencies, and it may be difficult to learn, but one can really experience the culture when utilizing the public transportation. While on public transportation, you will see and recognize more about your area, you will have the opportunity to meet more locals and you will undoubtedly put yourself in little adventures daily.
The public transportation here does not include cool subways or elevated trains, but does include several types of buses and taxis that will get you anywhere you need to go. With more expats and people visiting Panama, maybe even the signs of the times will change and trains and subways will be the next infrastructure that is built for this country....