For ex: You need to spend 3 hours and write a 5 page report that is due on Monday at 9:00 AM.
You spend the whole week not working but feeling guilty about not making progress. Then suddenly in the last minute i.e a few hours before the deadline i.e around 5:00 AM to 8:00 AM you start panicking and make progress. You turn in less than stellar report.
With a contract based strategy you still procrastinate. But the end result is much better. i.e You need to finish 2 pages by the middle of the week or you pay $25 per missed page. Another 2 pages in the second half of the week. This way you still procrastinate and occasionally you pay the penalty but still you would be done with the essay/ report 2 days in advance rather than the last minute where the consequences are way higher in terms of getting a bad grade/losing scholarship/not graduating/ not getting into a better career etc.