I recommend you take a spiral approach to learing the material. pick a topic and gain the basic knowledge necessary to master the topic - then practice using a test taking method that will tkae the most advantage of time and leave the least room for calculation or reading errors. Do multiple of the subjects and then take a diagnosit exam with metrics that can tell you what you are doing well at and what you are struggling with. The most important is heavily review any questions you do - pretend you are teaching it and find out exactly step by step what to do and what in the question requires you to do that action. AFter you have reviewed the exam start again with studying the weakest areas from your practice exam - make sure every question type has method that is consistent - having a consistent method is the most important to test taking. Keep working at this and you will continue to get better.