While reading, you decide to use the left margin for
questions and use the right margin for summaries.
You take a short break. What should you do when
you start reading again?
Keep your notations consistent: questions in the left margin;
summaries on the right.
Switch what you've been doing before. Put summaries on the left
and questions on the right.
Stop making any summarizing after five pages or so of a longer
text.