FutureLawyers has a link to a free tutorial on “Researching Companies on the Internet.”
(I presume FutureLawyers mean “Using the Internet to Research Companies” rather linking you to a tutorial that will show you how to research “Internet and Internet-only” companies. A small grammatical clarification, but sometimes small confusions can make for major misunderstandings. Of course, only us fussbudget sorts would even have noticed such a small thing! So visit FutureLawyers and enjoy, with impunity.)