Cornell notes and the double-entry journal formats are both good models for class lectures or sources that have a large amount of text. They give you a space to jot down key ideas; more importantly, there's also an area to add comments / questions, draw diagrams or add other notes / symbols. By doing this, you actively have a conversation with the text, engaging with the material instead of just recording it, which helps deepen your understanding. Try them both to see which you prefer!
source: cornell.edu
