Stamina is a very important issue for this test.
One, you have to be able to sit for 7 full blocks of questions without a) turning your head b) without fidgeting with your hands c) without stretching and d)keeping your eyes at all times trained on that screen. Physically, I consider myself in good shape but it made a huge difference to be able to take a break after each block just to leave the testing area and do a couple of stretches. Even then, my legs were bothering me near the end. I would say just be mentally prepared to be completely dialed in for each block, and not be able to do any of the fidgety things you normally do while testing.
At least for me, I felt completely cool in terms of mental alertness for about 4 blocks. After that, it wasn't so much that I was tired, but that a certain 'fatigue' set in,not the "oh no I am too tired to think" type but the "oh man I really don't feel like reading through this question and thinking about it" kind. For me, it was about getting through that wall and fighting through, like anything related to our body it would come and go in waves (similar to the wall marathoners experience).
As far as preparing for the test stamina-wise, Taus (who I continue to embarass and flatter) made a very good recommendation for doing 100 Q randomly first thing in the morning every day for the last couple of weeks. You have to be dedicated! I would not go through the answers until evening, but just getting used to hopping out of bed, taking 20 minutes to freshen up and grab a bite to eat and then hitting those questions was a big plus for me at least come test day. There will be days when this feels miserable but it is well worth it IMO (note, I would stop doing this at least a day before your test!). I wouldn't do more than this just because it would be very difficult to do all those questions AND review them the same day while doing other things that need to be covered.
As far as adrenaline goes, I didn't really feel it towards the end. I had a bit of epi flowing the whole day, so it wasn't like I magically felt better near the end (although after finishing....🙂 )
Finally, I can't emphasize setting your sleep pattern before the test. Like many people, I am a bit of an owl, but I made sure at least to wake up early the day before my exam. Of course, it didn't help me sleep any better the night before, but at the very least make a token effort to not be completely off your normal sleep schedule when you take the test.
