In most homes, Diwali decor ends up in two places: the entrance, because that is what guests see, and the puja corner, because it has to be done. The rest of the house gets whatever energy is left over. That is fine. But a home done room by room, even lightly, feels noticeably different to live in over the five days, and it is less work than it sounds, because each room only needs two or three things.