If you are renting your property please ensure your buildings insurance covers you for any losses or injuries that your guests may suffer during their stay at your property.
There are numerous company policies and providers to choose from.
Encourage your guests to take out travel insurance throughout their stay in Thailand, again there are many cheap and available options available.
Ensure you have a fire extinguisher and instructions for a meeting point, and safe directions to EXIT your building.
A list of Emergency numbers including: