Over the years, I have occasionally run across the Internet Speculative Fiction Database when I would perform Google searches as I began researching a particular topic or work. Back at IAFA, Ritch Calvin told me that the ISFDB is a very important research tool that he uses a lot. Based on his recommendation, I have used it explicitly a few times in my recent work–including my entry on Bicentennial Man for Peter Wright’s The Critical Companion to Science Fiction Film Adaptations. If you need to find reviews of works and print histories of SF and fantasy works, then I would recommend you check out the ISFDB when you start your research.
Another cool aspect of the ISFDB is that Ritch is tirelessly posting SFRA Review metadata to the ISFDB, which means that my reviews are now indexed on there, too (see here). Thanks, Ritch!