I regularly use the following to find and listen to music:
YouTube
SoundCloud
Google Play Music
plug.dj
Bandcamp
iTunes
and then I have a bunch of downloaded music as well
generally if I download music, it is either because I am transferring it to google play or I am going to play audiosurf with it
I use Google Play to keep all of my favorite music in one place. I use SoundCloud to find most of it. I use iTunes to buy most of it.
I've tried Pandora, Dubtrack, and Spotify, but I don't like them.
I often use picosong to share and listen to unreleased music