Bonnie,
There are a few options that I can immediately think of that would help people reduce their costs. First seems simple but it can make a difference...turn off your electronics and lights when you leave your office. At a time where every cent saved is worthwhile, simple things like turning off computer monitors, overhead lights and lamps, and unplug any unused computers or electronics as they still drain a little power even being plugged in.
Secondly, avoid color printing as much as possible. Color ink costs more thank black ink so unless completely necessary, stick to the black ink when printing off meeting materials and such.
Consider turning the temp of your office down a degree or so and close off any areas that waste the heat/air from your building. A one degree change may not be noticeable to your employees/clients, but it will help reduce your overall energy spend. Another option here would be to set a timetable on your thermostat to run at a cooler temperature overnight to use less energy keeping the place at a steady temperature when no one is in the office.
As for marketing and promotion, consider less expensive methods of getting your message out there. Are there any forums or communities you can become a part of to engage with your customers more directly. Additionally, there are numerous sites out there that will let you publish quality articles at no charge as long as they are beneficial to the readers and not strictly self-promotional.
Lastly, if you do not have a web site for your business, now may be the time to consider getting information about your company out on the web. People are searching and browsing more than ever and a web site can be a really inexpensive way to get a larger audience for your business.
Also, I did a real quick search on this site and found a couple of articles that may also have a few ideas related to this topic.
A Few Ways To Cut Costs
Tips to Starting A Cost Reduction Strategy
I hope these help!