For the past few years Spotify’s Discover Weekly has been the main way I discover new (to me) music. Secondarily I guess just from browsing the related artists of the ones I already listen to. Looking for other strategies inside or outside of spotify.
Mainly YouTube, their algorithm is pretty good about what I get recommended although I do tend to see some songs more than a couple of times. I find Spotify recommends songs that I’ve already got in a playlist far too often