Mintel is a great source for consumer market research, particulalry for technology products, food and beverages, and multicultural consumers.
The GMID database is an excellent source for in-depth market research reports and statistics for the US and internationally.
Marketline Industry Reports cover more industries but fewer countries and are less in-depth. Marketline Company reports include SWOT analyses and revenue analysis.
Ibisworld Industry reports are in-depth reports for all aspects of US business.
Mediamark is a rich source of consumer data and demographics but is only available for the US. We do not have a source for Mediamark type data outside of the US.
SRDS Media Solutions database includes contact information for placing ads as well as advertising costs for consumer or trade print publications.
Hoover's is a great source for company information, including financial data and SWOTs. It is also easy to link to 10K reports through Hoover's.
Use Business Source Complete to find full-text articles from trade journals or scholarly sources on almost any type of business question or topic.