I made 10 times as many images as the other students. I destroyed all those negatives except a few. I did it as a reminder that you can't afford to waste time: take it seriously. As a good picture would come, I would never know exactly what I had done. When you did see it, it would strike you as a great surprise – who did that? How did it happen? Being surprised by your own work makes you both less serious and have serious reverence.