I just came across a terrifically handy tool from Alacra called the Periodic Table of Business Research Databases for identifying the right database for business-related research. There are a vast number of databases available on the market, each with its own focus and content depth. This tool provides a nice, quick and dirty overview of most of these information sources, identifying them by the various categories of research (company profiles, credit and investment research, market research, news, etc.).
Unfortunately it is missing some key Canadian databases, such as Infomart and Newscan, but I’ll be bookmarking it.