If there is an odor, address the problem directly by cleaning or removing the cause.
Open doors and windows.
Improve ventilation.
Use a stove fan when cooking.
Leave baking soda in open containers in refrigerator, closets, and bathrooms.
Most air freshener products either mask the odor or contain chemicals that desensitize your nose. They also contain chemicals that contribute to air pollution.
Avoid products that contain paradichlorobenzene.
Air fresheners/disinfectants don't disinfect the air when sprayed into the air. They are disinfectants only when sprayed on surfaces.
To scent the air:
Set out potpourri in open dishes.
Simmer cinnamon and cloves.
Burn scented candles.
Deodorizers
For carpets, sprinkle a mix of baking soda, borax and cornmeal liberally on carpet. Wait an hour or overnight. Vacuum.
Sprinkle baking soda in the bottom of cat box before adding kitty litter.
Sprinkle borax in the bottom of garbage cans to inhibit the growth of odor-producing molds and bacteria.