This is what I find works best
-When learning sections, dont go for every detail, learn the key points and the key statistics. I usually learn these by literarly reading the section, writing the points and writing them again from memory (repeat untill memorised, even if its repetetive)
-Consider thematic changes/judgements (e.g. to what extent did Khrushchev raise living standards in the years...)
-Watch documentaries
-Do practice papers/learn the technique (especially how to condense arguments/points with effective time management), if you don't feel confident on the topic, use notes or the textbook
Hope for the best! im ******** myself