One trick that helps me taking a nursing exam (that a professor taught my class) was to never change your answer! Because more times than not your changing the right answer. What helped me on fundamentals was reading the Taylor, but focusing in on what the teacher taught about. Especially if they give a study guide for the exam. Sometimes it helps to underline key words in the question so you know exactly what you're looking for. Sometimes the answer will directly relate to those key words.