How should I study for my APUSH final?

Someone told me its more about understanding the information rather than memorizing - but I find that to be more true for areas such as Mathematics. History is very detail-oriented and I understand its about being able to connect events to each other and know the information in a cause and effect kind of way, but I'm absolutely sure what it really comes down to is memorization. Problem is I have a horrible memory and find myself blanking out while I'm trying to repeat something 100 times just to memorize it. And I have an entire 30 page google doc to go through as a 500 term quizlet - I should have stated studying earlier - but I procrastinated and studied for other finals. I'll pull an all nighter but I still have to study for another subject and I still feel as if I won't have enough time. What study techniques should I use? Should I take study breaks? How should I manage my time? Etc?
How should I study for my APUSH final?
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