My advise is that if you know it you know it. Don’t over think it will do more harm than good. Stick with your first instinct on a question. If you really aren’t sure and it’s a multiple choice, follow this flow. 1st read the question. 2nd look at your choices. 3rd read the question again. 4th eliminate two answers. 5th read the question one more time looking for key words and what it is really asking. 6th pick the best answer. Keep your feet flat on the ground sit up straight and focus on your breathing. Brain needs oxygen to function. Hope this helps.