Check out the Hobbies & Crafts Reference Center. This collection of magazines, trade journals, blogs, videos, etc. offers a surprising amount of resources for makers, performing artists, collectors, and other creative entrepreneurs. Try searching for your topic + keywords like “business” or “market”, etc.
Entrepreneurs perceive opportunities and pursue them by creating new businesses or organizations, or propelling organizations in new directions. Innovators solve problems by designing, building, and delivering services and products in new ways. Small independent businesses comprise the vast majority of firms in the U.S.
Source: The U.S. Small Business administration
The Entrepreneurship database (from Gale) offers many resources for your business. From the homepage, we recommend browsing:
Gale Legal Forms offers Maine-specific legal forms such as LLC formation, nonprofit bylaws, service contracts, permissions/releases, employment agreements, and many more. If you plan to operate your business in places other than Maine, please look for local versions of this source (start with a local library).
Sprint by 
Entrepreneurship by 
Building a Successful Social Venture by 
Successful Business Plan Secrets & Strategies by 
The Startup Community Way by