"What Color is Your Parachute? A Practical Manual for Job-Hunters and Career-Changers" by Richard Nelson Bolles. A new edition of the book comes out every year, and is available in bookstores. In addition, the book also has its own website which includes an extensive list of Internet resources.
"Alternative Careers in Science: Leaving the Ivory Tower" edited by Cynthia Robbins-Roth. Twenty-three scientists who work in "alternative careers" contributed chapters. This book is available in bookstores.
"Job Opportunities in Health & Science" is published by Peterson's.
"Career Renewal: Tools for Scientists and Technical Professionals" by Stephen Rosen and Celia Paul, published by Academic Press offers good advice for all job seekers.
The American Chemical Society publishes several books and pamphlets, some for a fee, and some for free. Many of these brochures are now available on the web; click on the links below to access:
"Directory of American Research and Technology: Organizations Active in Product Development for Business" published by R. R. Bowker. This is an annually updated directory of commercial research facilities. The reference costs $360, so it's best to obtain it from a library. For more information, contact email@example.com.
"Research Centers Directory" published by Gale Research, lists research-focused nonprofit organizations. This reference costs $520, so get it from the library. For more information, contact Gale Research, 835 Penobscot Bldg., Detroit, MI 48226-4094, (800) 877-4253.
"Occupational Outlook Handbook" published by the US Department of Labor describes what workers actually do on the job, and is available in print form but is also published free on the Internet.
"Job Choices in Science, Engineering and Technology" is published every year by NACE. It's available for $16.95; call (800) 544-5272.