How do you study for exams/topics effectively?

Jewel Joshy

How do you study for exams/topics effectively?
Can you include:
. . .
-studying times
. . .
-methods of study
. . .
-And generally how to study effectively so you an ace the tests
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Thanks, you can also mention about tuition,different subjects, etc! I need to get at least 90% minimum in tests to pass, need your advice...