Do not throw toilet paper in the toilet but use the dedicated trash can in the bathroom. Pipes in Costa Rica are just not thick enough. Dont ask me why.
Do not leave trash outside the house, but show it to the caretaker (Gumercindo) who will take care of it.
In case electricity or water goes out, stay calm. Check with the caretaker and explain the problem. In most cases, all of the area is out of it. There are candles and matches in the kitchen drawer. You should always carry a flashlight, especially when walking at night.
If you do not like bugs, then do keep the doors of the house closed at night while the lights are on.
In case of medical emergency, do not call for help but start driving to Cortez hospital which is 35 minutes south of Uvita on the Costanerra highway. You may also want to check if the doctor is in Uvita is in his office. He can perform first aid and many medical procedures.