Alison, thanks for writing. My desk in my home office also faces a wall so I know whereof you speak. If you can’t turn things around by separating the arms of the “L” and using one arm in the Command Position, place a mirror on or near the desk to reflect activity behind you. Here’s a link to a previous post about this: Good luck!
You can apply the classical principles of feng shui to other objects, such as your desk, in addition to the office itself. To start, be sure to place your desk so that it faces the door, as this will symbolize your ability to see opportunities and seize them when they arrive. If you work from home, this is a lot easier to accomplish because you will not have a boss telling you whether or not you can move your desk around. But if this is not possible at all, whether you work from home or not, place a mirror on your desk that gives you a view of the doorway in order to generate the same beneficial effects.
Beyond the layout, Cerrano also recommends paying attention to colors and materials in your space. "Be mindful with the style of desk and material you choose," she says. "A rectangular wooden desk is commonly the best recommendation in feng shui. The material brings natural energy into your space, while also cultivating a nourishing and vibrant quality of energy. If you prefer a standing desk, consider researching a wooden design. In general, the size, style, and color depends on the overall room structure and intended office environment. As a side note, you may also want to consider purchasing a desk that has soft or rounded edges—even if in a rectangular or L-shape design."

Native to Africa, snake plant is categorized under the plants family Asparagacea with scientific name Sansevieria, it is very popular houseplant. It has several local names such as snake plant, mother-in-law’s tongue, viper’s bowstring hemp etc. As per Feng Shui, it is considered to bring good luck. It was part of NASA Clean Air Study and found effective in improving indoor air quality by removing benzene, formaldehyde, trichloroethylene, xylene and toluene.

When you work in a cubicle type office setting - which means that your office set-up cannot be changed - you have to pay even more attention to creating (and keeping) good energy throughout your day at the office. While you might not be able to move your office desk into a feng shui commanding position or face your lucky feng shui directions, but there are still many ways to improve the energy of your workspace.