I wouldn't use anything chemical, like Fabreeze. You can get a diffuser and some essential oils - like citrus scents work well (grapefruit, orange, tangerine, lemon) and peppermint is always nice.
There is a great article on "Essential Oils in the Work Place" at this site:
http://www.essentialwholesale.com/aromatherapy.html(scroll about halfway down the page) well, here is most of it:
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The Japanese have been using Essential oils in the work place for years. Construction companies employ special engineers to incorporate Aromatherapy into their new buildings.
At one Japanese bank, Lavender and Rosemary are used in the customer area to relax and sedate while the worker areas are infused with lemon and eucalyptus to keep workers alert. When lavender is infused into the air, keyboard-punching errors fell by 20%, 33% with Jasmine and 54% with Lemon.
Calculus students were proven to increase their speed of learning by 230% with aromatherapy.
Lavender and Rose combined creates calming, stress-relieving and reduces blood pressure. After lunch, Lemon and Jasmine are used to refresh and revitalize. Peppermint is dispersed into offices and conference rooms to increase work efficiency, dispel drowsiness and lessen mental fatigue. Lavender helps establish a positive mood.
The Tokyo stock exchange has peppermint diffused into the atmosphere every afternoon to make brokers feel invigorated and refreshed.
Many workers have clocks that diffuse eucalyptus and pine before the alarm goes off.
Businesses that have invested in Aromatherapy for their workers have seen a major change in attitude.
The Heath Promotion Research trust has found that 80% of workers report feeling unwell because of their working environment.
People who work in offices have 2x as many colds, coughs, and sore throats. Essential oils combat bacteria and viruses. Employers that invest in aromatherapy units find that they pay for themselves within the first week.
Occupational stresses weaken the immune system. Essential Oils in Retail Nike shoes were used to test if aromatherapy could be used to increase sales. Subjects were either in an unscented room or in one with a light floral aroma. Some 84% of the people in the aroma room were willing to purchase and they were willing to pay an average of $10.33 more for the same item. Proof that aromatherapy has an effect on impulse decision making.
Gambling machines with Aromatherapy increases sales by 45%.
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You can get really great wholesale prices on essential oils on that site, and here is a good place to get a high-powered diffuser:
http://abundanthealth.us/catalog/index.php?file=catalog&action=catalog_productinfo&uid=4881&pi_id=85188&clist=&PHPSESSID=7926b6645d64ef1bf344294baa8d28e3