Using the name of the company and the word "advertising" or "marketing" to search for newspaper/magazine/trade articles in:
Mintel (for industry) Reports on different markets focusing on the consumer. Includes market drivers, marketing strategies, market size and demographics, forecast. You must register but it's free.
Business Plans Handbook Actual business plans compiled by, and aimed at, entrepreneurs seeking funding for small businesses. Presents sample plans taken from businesses in the manufacturing, retail and service industries which serve as examples of how to approach, structure and compose business plans.