This can be done according to your own personal preference. You can hang some magnificent paintings, find someone with good calligraphy to inscribe for you, or buy some calligraphers' words to decorate your home. You don't have to hang some words, but you can also hang some commemorative decorations such as calligraphy and painting, photo frames, etc., mainly because you like them yourself.
It is suggested to hang a Feng Shui landscape painting behind the sofa in the living room! There is a geomantic saying: "The mountain is in charge of people, and the water pipe is rich", which means that people and money are prosperous and the financial resources are rolling. Hanging a landscape painting on the sofa in the living room also implies that there is a backer behind it. A pair of landscape paintings with clouds, mountains, water and trees means that financial resources are rolling and people are thriving. Therefore, it is a very wise choice to hang a landscape painting with beautiful mountains and rivers and flowing water behind the sofa in the living room.