I used to find decent radio stations but now even those are bland most of the time.
Pretty much going to festivals and checking out new bands based on others recommendations. Wandering past a stage and getting sucked in by the music, overhearing others talking about a band, somebody playing some tunes on their computer or in a car. A band I like covering a song by another artist.
I can never see every band, and I can never meet every person, but I'm you bet I'm gonna try. Music festivals FTW. (Not to be confused with EDM festivals of recent years)