Compose an altar: Place a censer in the center before an image of the Goddess. Have a 12-inch (or so) round mirror there as well. Ring the altar with 9 white candles. Burn protective incense (such as frankincense, sandalwood, copal or rosemary) in the censer.
Beginning with the candle most directly before the Goddess image, say these or similar words:
"Lunar Light, protect me!"
Repeat as you light each candle until all are glowing.
Now, holding the mirror, invoke the Goddess in Her Lunar aspect with these or similar words:
"Great Goddess of the Lunar Light
And Mistress of the Seas;
Great Goddess of the Mystic night
And of the Mysteries;
Within this place of candles bright
And with your mirror nigh;
Protect me with your awesome night
Whilte ill vibrations fly!"
Standing before the altar, hold the mirror facing the candles so that it reflects their flames. Keeping the mirror toward the candles, move slowly, clockwise around the altar, watching the reflected firelight bouncing off your surroundings.
Gradually increase your speed, mentally invoking the Goddess to protect you. More faster and faster, watch the light shattering the air, cleansing it, burning away all negativity and all lines along which the ill energies have traveled into your house.
Charge your home with the protective light of the Goddess. Race around the candles until you've felt the atmosphere change, until you feel that your home has been cleansed and guarded by the Great Goddess.
When finished, stand once again before the image. Thank the Goddess in any words you wish. Pinch out the candles one by one, bind them together with white cords and store them in safe place until and if you need to use them again for the same purpose.