If you use fabric softening sheets, after purchasing the dryer sheets, cut them in half and replace them in the box. Half a sheet works just as well as full ones. Use charcoal briquettes as refrigerator fresheners. Use briquettes as air fresheners in the bathroom. Hide them behind the toilet or under the sink.
Vinegar works as a room deodorizer.
Place a small cupful in any room that needs freshening. Works especially well on kitchen odors. Use white vinegar as a water softener in your automatic dishwasher, or add half a cup full of vinegar to the rinse cycle of your clothes washing machine to act as a fabric softener. If your freezer is not full of bread or other frozen foods, fill clean milk jugs with water and put them in the freezer. They will keep your freezer running more efficiently as well as keep the food frozen longer during a power outage.