Check out Urlich's Directory of Serials to see if anyone publishes a trade journal in your field or industry. Magazines and newspapers - Each and every day, studies and other survey results are released as news events. Also, look into news about environmental factors such as the leading economic indicators or the upcoming local political elections. Trade associations - Most associations have reports on the industries they serve, the standards they operate under and leaders in the field. Many even conduct educational seminars on trends and other issues.
Associations are also helpful in researching the competition.
To help you find the right association, two great resources are Gale's Directory of Associations and the National Trade Professional Associations book. Ask for access to data that has been collected through special research projects. Sometimes you may even be able to have students help you with your research. Chambers of Commerce - Your local Chamber is a terrific resource for information on the community you hope to serve, other local businesses and maps of the area. You can also learn from other members at Chamber networking events.