I’m a big fan of keyword research but I also know that the data provided from any keyword research tool has its limitations. For the most part, these tools can only provide you information on what is being searched. What they can’t do is tell you which searches were relevant, which results were quickly discarded in favor of a different or more refined search, or which searches actually provided the visitor with exactly what they were looking for.
I’m not a big searcher, but I find that when I do I start with the basic concept of what I’m looking for. I’ll take a few seconds to scan through the results, and then I’ll go back and perform a more specific search. This pattern could happen two, maybe three times, until I feel that I’ve gotten the information I need.