In this post, Natalia discussed the stress of studying for Ph.D. orals. It is one of those nightmare situations where, no matter how much work you have done, you still can think of much more work you should have done.
Along that path lies insanity and exhaustion.
So I offer for Natalia and others Drout's First Law of Studying for Ph.D. Orals:
If you read a stack of books as high as you are tall, you will pass.
I came up with this law at Loyola Chicago, and, as far as I have been able to tell, there have been no exceptions. My friend Bryon Grigsby (now Dean Grigsby at Centennary College) is well over six feet tall and was not happy about the way Drout's First Law applied to him, but he read his stack, and he passed.
So, cheer up, Natalia. You now have a metric to use for your studying.