Start with a Country Report to gather data on the macro-economic environment. Some industries have pre-packaged reports - energy, real estate, and retail. Others require a keyword search. You can also search for company specific data.
Trade Associations
Look for trade associations associated with your industry. They are a great source of statistics.
Census Business Builder: Small Business Edition provides easy access to information about potential customers and similar businesses for those starting or planning a business. The data are presented in a map-based interface that is accessed in four simple steps