This is a test of commonsense. Complete the next sentence:

How to refinish a coffee table
Set up your work area.
Because you will be sanding the coffee table and creating a lot of dust, it is best to work outdoors or in a garage. If this is not an option, choose a room that is well-ventilated and will not be needed for use during the refinishing project.
Lay down a plastic drop cloth to cover the floor of the room and collect the sanding dust. Make sure the room is not really in use by anyone else during this time period.