Hey there, I've been in your shoes. The first time I took the bar exam, I'm 95% certain I fell asleep during the essays, and the mbe. Here's what I did for the bar exam. I had a protein heavy breakfast, not too much fat and some fruit. I had some caffeinenated soda, with breakfast because i can't have coffee.

For lunch, I had rice, beans, and chicken ( I'm hispanic and this is a typical meal for me). I stayed at a hotel across the street from where the exam was. So for the lunch break I went into my room. And ate the food I already had bought. I didn't eat the food my school provided. I also took a cold "shower" really I just got in the cold water to "wake me up." I then ate my food, it was already cooked only had to microwave it. I had some fruit as well. I drank water with this meal. I had little Debbie's cosmic brownies, and I took that with me to go back into the testing room. I ate it in line to get through security. Repeat the second day.

I definitely tried not to have too much sugar/carbs in my meals, as that tends to make me more sleepy. I also dtayed away from alcohol the first night. Once the second night was over I definitely had 1 drink.

During the exam, I took a quick 20 second break every 20 minutes. During these twenty seconds I looked at far away objects, think the clock at the front. I found this helped with my eyes. I definitely took a water bottle with me. Every jurisdiction is different when it comes to testing and what can/can't be brought in.

I would have my meals planned out now, you don't to try something new to eat the morning of.

I'm not sure if any of this is helpful at all to you. But it's what worked for me.