If you don't have a diffuser, you can still enjoy the wonderful aromas of essential oils in your home.
Here are three room methods to try...
Candles - Light a candle and wait until the wax begins to melt. Then add 1-2 drops of the essential oil of your choice to the warm wax. Be careful not to get the oil on the wick.
Humidifiers - Add 1-9 drops of the essential oil of your choice to the water.
Water Bowls - Put boiling water into a bowl and add 1-9 drops of the essential oil of your choice. Close doors and windows and allow five minutes for the aroma to permeate the room.
These methods and others are described in The Complete Book of Essential Oils & Aromatherapy by Valeria Ann Norwood, available from Beeyoutiful.com