I haven't read anything else in the thread, so forgive me for jumping in.
I am pretty lazy. In fact, I'm by far the laziest 4.0 student I know. I just don't let school get to me. I don't get anxious at all before or during exams. In fact, the only thing that stresses me out is if I have a big project deadline coming due and I realize I'm going to be putting a lot of uncomfortable late nights into it to finish it on time.
Last quarter, I was taking a class in network security. It's a level 370 class. All I did was attend all the classes and take notes. I didn't study for even one second. Normally I'll at least cram for a half hour before the exam. I never had the professor before.
I completely forgot about the first exam. I came to class and everyone's head was in their notes and in the book (which I didn't even buy). I turn to one of my better school acquaintances and say, "Do we have an exam today or something?" He responds, wide-eyed, "You didn't study?!" I just lied, "I'm only kidding. Of course I studied."
So we get the exam. It's a big honking thing about 12 pages long with like two questions per page and tons of whitespace. It was pretty tough, but I felt like I did okay and for the parts I wasn't sure of I hoped my BS was good enough. That was by far the most actual handwriting I'd done in one sitting in at least a decade; my hand was killing me.
So the next week the professor addresses the class, "A lot of you haven't had me before so you didn't really know how hard my tests are or what to expect or what I'm looking for. Well, now you know and you'll be ready for the final." I'm like, "Shit, I must have bombed!"
He hands the test back, and I am sitting in the front of my row. I begin handing back exams and I'm seeing 55's and 68's and 70's. Then I get mine and I see a 109. "Sweet!" My friend, Mr. You-Didn't-Study, got a 71.
School is just... effortless.