LEAVE SPACE FOR MANEUVERS. As practice shows, to fully plan the upcoming purchases of decor and strictly adhere to this plan is an almost impossible task. Therefore, it is better to leave a little free space, which will take the fruits of impulsive purchases. INTERIOR AND DECOR - FOR RESIDENTS OF THE HOUSE, NOT FOR THE DECORATOR. If home improvement is done by professionals, it is important that at the end of the work the owners do not have the feeling that they are in someone else's home. Therefore, the owner’s desires are a priority, and the decorator’s task is to find an acceptable and aesthetic form for them. The omnipresent "GOLD SECTION". Decoration is one of many areas where the principle of the "golden section" can and should be applied. What is its essence? Suppose the whole is divided into two unequal parts. Most are 0.618 of the whole, and the smaller is 0.382 of the larger. At the same time, the smaller part relates to the larger one as the large to the whole. A similar size ratio is perceived by the human eye as close to ideal.