There are many Feng Shui cures / remedies for any given situation. The most effective and beneficial cures are ones that fit your style, and have intention behind them.
Plants are a great Feng Shui tool. Not only do they purify the air, but they can work as a Feng Shui remedy too! A plant can soften a hard edge, can add life to a lifeless area, can fill empty space, and can uplift the energy of a space.
If you don't think you can keep a plant alive, silk plants are a great substitute. Look for realistic lifelike plants.
Another one of my favorite Feng Shui cures is light. Light can be effective to illuminate dark spaces, to uplift the energy, and to highlight areas where needed. I often use uplights or spotlights to illuminate dark corners.
Windchimes are a very common Feng Shui remedy. They circulate the chi energy, provide sound, and can fill a missing area. Windchimes can be used both indoors and outdoors.
With Feng Shui remedies, you can be as creative as you would like. Appoint a purpose, an intention, to your remedy and you give it power to work for you!