Answer:
Practice Practice Practice
Understand what you are doing (don't just memorize)
Step-by-step explanation:
Please understand and don't just memorize concepts. This will save you so much time in exam because if you understand the concept then you can apply your knowledge to many different kinds of questions whereas if you memorize it and don't necessarily know the concept well, then if the question is worded differently you won't know the answer.
So study to UNDERSTAND not just to memorize and do good on exam. Memorization is necessarily as well but if you understand something you won't have to memorize it.
Practice Practice Practice. Practice old exams, ask friend for help, browse the web for question, find actual sample problems, and practice practice practice.