Using dried sage or sweet grass, smudge your house, moving from the front door, clockwise throughout the space. In every room, envision the smoke gathering negativity, and the negativity evaporating along with the smoke. Stop by windows and doorways and say: 

Home and portals now be clear, 
happiness and love abides here. 

Return to the front door and carefully smudge the entrance and say: 

Bless those who enter here, 
Let them be loving, happy, and clear. 

Draw a pentagram, inviting elemental protectin, and say: 

Earth, Air, Fire, Water, 
protect the children, mothers, and fathers. 

Unto all let it be known this is a safe and happy home.

(Source: llewellyn.com)