Where you work and how it looks directly affect the type of work you do in that place. That's why highly creative corporations usually have highly creative office space, as it can subconsciously influence and inspire the mind. It also may, sadly, be why the decor of old government buildings and factories are rather drab, as whoever designed them may have thought little inspiration was needed to do those jobs. It's important to give employees something to keep them interested in their work, and good office decor helps.
Employee W-orking Areas
There should be a separate workstation for each employee with outlets for all the things they may need. It should have enough space to roll a chair from one side to the other. Versions of cubicles that you can easily see over or that have windows will work, but small offices are preferable as they give employees more privacy, which allows them to concentrate on their work---and they appreciate it.
Wall Art and Photography
The walls, which should be painted a color other then white or black, should bear something worth looking at---something that shows off a certain creativity or interest in the space itself. Good art is subjective of course, but good photography is not as difficult to find. Cool movie posters or classic advertisements are great options, as are accolades the company has won.
Florescent lighting is flat and uninspiring, and people working under it often claim it saps you of energy. While this type of lighting is the most economical, mixing in concentrated soft white bulb light can work quite well. This way, the lighting can also be changed in the office, especially if dimmers are installed, giving a sense of change and uniqueness to different areas of the office.