I use YouTube to find new music. Their recommendation usually knows what my music interest is. The other thing is watching a fashion show in YouTube. Some fashion shows have a nice background music. It depends on the message or story that the designer wants to tell to us. The beat could be fast or slow.
If I find the music is nice, I will try to find the music title in video description or comment. "Helpless" by Federico Martelli [0] and "Time" by Arca [1] are the examples that I love.