I remember when I had to use a fire extinguisher; it was pretty hectic. So, from what I know, first, you gotta know what you’re putting out. Like, didn’t know initially but there are different types – some for wood and paper, others for oil fires, and so on. Then, think about where you’re gonna keep it. You don’t want it so big that you can’t even lift it in an emergency, right? And definitely check if everyone at home can use it. That thing has to be ready to go; make sure it’s not too heavy!