Id also say place a mirror at the front of your house, near your front door to reflect any negetive vibes and energies from coming in.

Make sure that you dont have any elephant ear plants near that room (on the outside) as they invite negetive and evil spirts to come in.

I think when I come to Melbourne that I have to buy some sage sticks...we have NOTHING like that up here and my house need's a good clean out