There are magazines and online sites, and forums like Audiogon I like. As people have said before, I use them as starting off points, for items I would look for and pay more attention to at a show.
I have to say, I particularly like HiFi+, stereo mojo and Positive Feedback. 6 moons I just find too verbose, I lose interest half way down the 5th page.
Two recent examples of what I picked up, the first the Audio Research Ref 75 Power Amp, I listened to at a recent show. All the hype seemed amply justified. Secondly, the Gigawatt line of power conditioners, I have'nt had time to look out for yet.