Open windows and doors to try and air things out. You can put fans on blowing out of the home. Find and remove any contributing sources of the odor. Vacuum all drapes, upholstered furniture, floors and carpets. Wash down all non-carpeted floors, walls,sinks, toilets, counters, cabinets etc... Shampoo all carpets, remove any molded carpeting. Vacuum out vents. Machine wash linens, bedding and clothing. Clean all upholstery and if if you cannot find the source of the odor or time does not permit for you to do so, call in the professionals.