I'm worried about potential asbestos exposure. Where am I likely to find asbestos in my home?

How old is your home. If your live in a fairly new home, there is likely not any asbestos in it. Environmental regulations and building codes have largely eliminated asbestos from building materials in the US. Some places where it might still be there include sheet rock, floor tiles and the heat shielding in the backs of some light fixtures. These things have to be damaged and shedding dust to be a problem.