1) Corporations form a separate legal entity through documents filed with the state, protecting stockholders' liability but being more difficult to form than other business structures like proprietorships or partnerships. 2) Franchises expand a business through others' investments while maintaining control over branding through a written contract where franchisees pay fees and percentages of profits for operating assistance. 3) Company mission statements provide direction by outlining a business's purpose, like Google's statement of organizing the world's information to make it universally accessible and useful.