Every time I moved to a new place (long story short, I have moved more than 25 times as an adult) I would smudge with sage and incense. I wanted to cleansethe energy of the people who left the place before me, so that there would be a clean slate and bad things wouldn't happen to me. I used to think it pissed of the spirits and they would return eventually and drive me out by causing real world difficulties. Looking back, I can say that it was bipolar playing tricks on me, not spirits. But I do miss the smell of sage burning and the feeling of new hope upon moving into a new place.