i go with insound.com a lot
also, heres a funny thing i do:
go to amazon.com , look for "new and future releases" and then i just browse through them. i usually sort them alphabetically and go through them week by week and when i see an album that i dont recognize, i click on it.
after a while i can spot the albums i would like by their album work, band name, label, etc.
i.e. - if a band is called "Beneath the Dead Corpse" i know its not my cup of tea (at least odds are its not!)
this process takes forever really and i need a spreadsheet to keep up with it, but i have found literally hundreds of new bands this way (this was how i first learned of the white stripes back in 2000).