I go to a few review blogs:
Blastitude
Brainwashed
Still Single
Tiny Mix Tapes
sometimes pitchfork.
Some bulletin board chatter:
Board.crewcial
Termbo
Yes on FMU.
I talk to people at record stores and ask them, what are you listening to. I buy about 10 LP's a week, some 7"'s, tapes.
I run a record label so new music is always welcome to my ears.
I go to thrift stores, used shops and dig as well.
A nice stereo is great, but its to play the music for me.