I passed all three levels in a row, so here is my advice.
Level 1: Straight Memorization
Level 2: Heavy Quantitative Skills and Fundamental Understanding of Theory, Know all Assumptions and Nuances of Theories, Understand when to Use What Model, Why, and the Anomalies with each Theory. Understand the Fundamentals facilitates an easier path to memorizing and utilizing most equations. Should know the answer before running calculation.
Level 3. Easy Material, but Must be able to utilize quickly fundamental knowledge to understand the question be asked. Once you know where the questions is going, must be able to quickly sift through the voluminous details to filter out the BS and utilize the correct the info. Once you have crossed those hurdles, the test makes you think in multiple dimensions and utilize spatial reasoning to come to the most reasonable answer. Then be able to succinctly articulate your answer, explain your rationale, and show your work. Hardest test of the three, and you must learn to take the test so take as many practice tests as early in the process as possible. Do not get to verbose in your answer, as it only eats up valuable time.
Simply put; Level 1 = Memorization, Level 2= Quantitative and Fundamental Reasoning, Level 3 = Test your analytic thinking along with spatial reasoning skills. It is very important in Level 3 to have a good cross section of experience in economic theory, practical knowledge of high finance/investing, and confidence in your answer so that second guessing doesn’t slow you down. You flat out don’t have that much time to over think the questions or the grammatical of structure of your responses. There are a ton of topics that are in the curriculum that can eat of a large portion of your studying time that will not show up on the morning sections as experts could not answer the questions in the time given. Understand the concepts, know the fundamentals, and memorize the hedging techniques and equations. The CFA will get its points so let them have it.