I would be listening to a bunch of amazarashi songs before doing it. I'm not quite sure if I'd be able to calm down and focus if I listen to music while in the midst of hanging myself. It would be too distracting.
This, in particular, would be the last song I'd ever listen to. It's my favorite amazarashi song. I've decided on this being my "last song" a long time ago and I haven't really found anything else that I liked more than this song.
Just in case that song gets taken down, it's called Bakemono (Monster).