When you come into an apartment and you walk right into a wall, this stops the chi. You need to put up a mirror, creating the illusion of more space. A certain amount of feng shui is designed to protect you from negative influences, but the end result is to give you a balanced environment that is supportive of what you want to do. A couple of reasons. One way is to bring the natural environment in.
Some people put small fountains or rock gardens in their offices, and plants help.
People who sit with their backs to the door put up a mirror to see behind them. Apple and other companies have realized that, to do creative work, people need private offices. In your home, start with your bedroom, where you most need to be secure. Get your bed in the most favorable position, so that you have a wide view of the room including the door. If the entryway to your home is narrow you can put up landscapes that give a sense of space, or a mirror.