I hope no one answers this question haha!
You are on a wrong track there, the key to S1 is not to try and remember all that information, it is to compose it into material that you translate onto the page. The common way of achieving this is through note-taking and annotations. Rather than underlining or highlighting key points of information, simply rewrite or re-symbolise (you don't have to use words, better not to) all the information into something you can work with.
I would always annotate, scribble and write down something for my S1 questions, sometimes even draw venn diagrams, little event trees or scribble some mind-map style diagrams to link everything in the text. It sounds time consuming, but in all honesty it is efficient and saves a lot of time (that is otherwise wasted on useless thinking / excessive reading).