Store collections of small items behind a glassed-in curio cabinet to cut down of the amount of dust these items can gather. Because fabric wall hangings collect so much dust, consider replacing them. If you have pets, keep them outdoors if possible. Consider installing a pet containment system . Keeping pets in the house is particularly problematic because dust mites like the warm environment of their fur.
Pets also track in pollen, and one out of every ten people is allergic to cat or dog dander.
You may want to invest in a room air cleaner with a HEPA filter. Make sure to dust or vacuum around ceiling fan blades. Usually they are coated with dust. Don't leave the car idling in the garage. Doing so allows carbon monoxide fumes to build up in your garage and eventually filter into your home.