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.
Mirrors are very important, and storage is too.
Manage how many things can appropriately be in the same space. Don't get anything new unless you give away something. You don't see the kind of clutter in other countries that you do in America. Clutter is stagnant, stored energy, and it has a psychological effect. It creates stress.