Simulating the Exam Experience

I want to make sure I'm mentally prepared for the experience of taking an 8-hour long exam. I'm going to set up a simulation for myself today and make it as close to the real deal as possible. Seven one-hour long blocks of questions with 1 hour of break time. I even have some snacks prepared for my breaks. While I'm not looking forward to spending 8 hours on my laptop, I need to find out how this is going to feel so I can be prepared for doomsday. Wish me luck! I'll report back in 8 hours.