I use a drop in vac freshener for my vacuum cleaner - makes a big difference when you vacuum. Also buy some tumble dryer sheets and slip one behind each radiator in your house and in each cushion cover case on your sofa (and also you could pop one in your duvet on your bed each time to change the sheets). Spray soft fabrics (curtains, cushions, rugs) with a room spray or any scented fabric refresher. Change & launder all curtains, cushion covers, blankets, throws, towels, bath mats regularly and use a great smelling fabric softener in your wash. If you have laminate flooring vacuum and wash regularly again with a disinfectant, and use a steam mop if you have one.