Several ways.

1, YouTube Music. I have a premium account so for any song I play, YouTube creates a playlist of similar music.

2, Radio. I listen to a couple of great radio stations, including The Rock 93fm, which has an annual Rock 2000 countdown. 2000 of the greatest rock songs as voted by their listeners.

3, Gaming. I've discovered many great bands while gaming, including all the GTA games.

4, Social Media. Love reading about what other people are listening to locally and around the world.