More than a song, it is actually the melody of the day: Harmageddon from Apocalyptica is one of the first singles of the band and it is simply good when it comes to put your mind in a state of trance. I use it to study and it works for me. The rythm and pace of it awake my brain and fill it up with strong bass notes created by the cellos of these metal-lovers. Hmmm… Check it and convince yourself.