When taking college exams, I always found it helpful to have a copy of the syllabus in front of me, and then organized my notes and assignments from there. If the professor or TA offers study sessions, I highly recommend attending. Make flashcards for key words, equations, whatever it may be depending on the class - especially if they are hard for you to recall. Look at them on a daily basis, even if it's weeks before the exam; it will help prevent needing to 'cram'. It can also help to talk to friends that have taken the class before; they may have insights as to whether your professor usually tests from lectures, readings, or a combination of both. Don't wait until the last minute, and stay calm during the exam. Good luck!