I crammed a lot, but whatever works for you, really. some people had a very strong work ethic, but got low marks. I was very lazy, but I always finished the work in class and although I did most things last minute, I always made sure to do them properly and to a high quality, and covered everything (it's possible).
but essentially just make sure you cover all the dot points and can apply these dot points/use the knowledge, such as in questions. i.e. don't rote learn, but actually learn and understand the content. it is so much easier than memorising, because you will remember it due to actually understanding it.