The art of the enduring delay, the strategy without strategy of doing anything as a means of doing nothing:
The worst sin in a student (other than plagiarism).
In order to clarify the concept, and to successfully fight against this pitiful habit, here you have some videos and links:
The first one -in Spanish- is also the simplest:
An easy explanation (in English):
Two interesting approaches (with Spanish subtitles):
And there is even a musical version you may find amusing:
Finally, THIS FRAGMENT from the ancient TV show Redes offers a clear, useful approach to this topic.