Hi rsx, firing squad... it's a good one
Don't be too full because it may give you stomach cramps during the exam. I did have a trio mcmuffin the hour before the test and it seemed like it was going to be my last meal ever before going to the firing squad

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The worst is that verbal comes at the very end and you may have been drained by the time you reach that section. Just make sure that you build such stamina on CATs before doing the actual exam. No matter how you do in those CATs, do not take the scores too litterally as there may be a large psychological factor affecting your score during the exam. Also, avoid Kaplan CATs the week prior to the test.
Try to keep your composure and do not touch any material the day before. Good luck, you will get there and we will wait to hear from you. Vanquish the GMAT beast