Memory capacity to some extent relies on a bit of individual talent/natural ability as well as various factors including passion for the particular subject, and ability to use a method that appeals personally to that particular person to remember stuff. Hence, before you start to memorise anything, you need to consider what type of a learner are you, i.e. are you a visual/kinaesthetic/aural learner or a combination and then once you identified the type of learner, you can then proceed to implement strategies that suits your own personal interests. The key to memory (this is from psychology lectures I learnt this semester) is not only in trying to make the information as personally relevant to you as possible, but also to use other techniques such as imagery, rehearsal (which requires repeated engagement with the information), it has been found that spaced out learning is much more effective than massed learning, what this means is essentially you are better off trying to remember stuff as you go along the semester rather than trying to cram it all in one go the day before the exam. Another technique that I always advocate is trying to explain the information to a mirror or to another person, if you can explain it in a way that the other person can understand it, it means you have a solid grasp of the information.