If there's a build up of bad energy, vibrate Sananda (sanskrit for "Joy") while walking through your home. Stand in each room, vibrate it 10 times, then go into the next room and repeat. As you do this, visualize bright light (either white-gold or the electric Demonic blue) sweeping through the room, including below furniture, in the corners, along the walls and ceiling and floor. I also do this in bed mattresses, because we spend so much time sleeping, and malefic energy can build up there. Do the same for couches too.

You can get some clear quartz or calcite crystals and place them on a desk or wherever, even just for a few hours. This will clear out stagnant energy, and eliminate malefic energy.

I personally have not tried smudging (lighting paolo santo wood or other incense sticks and walking through the home), but others have reported good effects from that.