During the research lecture one of the things I mentioned was the relationship between the music you listen to and productivity. As usual lifehacker is copying me yet again
2. Lose the Lyrics When You’re Learning
For more immersive and mentally tasking jobs, classical or instrumental music has been shown to enhance mental performance more than music with lyrics.
If the task at hand is especially complex, shutting out all outside stimuli (including music) is your best bet. Even faint musical chords playing in the background can cause cognitive interference—when your performance declines because your brain must dedicate resources to help you process both the task and the music.
You can see my debate work playlist which is updated infrequently to get you started