Post songs that use stereo sound for example the Left/right effect of headphones well.
(Feel free to point out songs that use the effect in an annoying way as well)
The end part of Nicki's verse on Kanye's Monster is a good example.
This is a good example where the guitar is heard from one side, the drums on the other and vocals in the middle.
Also this song by Chvrches is a pretty obvious use of it:
