Method 1: Active reading
Before reading, skim the headings and write down what you want to find out. While reading, stop at the end of each section and write one or two sentences summarizing it — without looking. Then check. This takes a little longer than reading straight through and doubles what you retain.
Method 2: Cornell notes
Divide a page into three zones: a narrow cue column on the left, a wide notes column on the right, and a summary strip at the bottom.
- Notes column: key ideas, definitions, figures — with page numbers.
- Cue column: questions or keywords that the notes answer.
- Summary: three sentences on the whole section.
To review, cover the notes column and answer the cues.
Method 3: Outline notes
Mirror the document's structure with headings and indented bullets. It works well for textbooks, reports and manuals with a clear hierarchy, and makes it easy to see how ideas relate.
Method 4: Question-based notes
Write notes as questions and answers: “What are the three causes of X? → …”. They turn straight into flashcards and match how exams and meetings will test you.
A fast note-taking workflow with AI
- Skim the PDF yourself firstHeadings, introduction, conclusion: two to five minutes.
- Get an AI structureUpload it to the study notes summarizer for definitions, key points and self-test questions with page numbers.
- Write your own notesUse the AI structure as a scaffold, but write each point in your own words.
- Ask about what you don't understand“Explain the example on page 14 more simply.”
- Test yourselfAnswer the self-test questions without looking, then check the cited pages.
Tools and formats
- Markdown notes (Obsidian, Notion, Logseq) work well: download the AI output as .md and edit it.
- Keep page numbers in every note — they save time when you write an essay or a report.
- One note per source, linked to related notes, beats one giant document.
Frequently asked questions
Is highlighting useless?
Not useless, but weak on its own. Highlight sparingly, then turn highlights into written notes.
Should I take notes on paper or digitally?
Writing by hand tends to help understanding; digital notes are easier to search and reuse. Many people sketch on paper and keep a clean digital version.
Can AI take notes for me?
It can produce a summary or a structure in seconds. Learning happens when you rewrite and test yourself, so use AI as a starting point.
How do I take notes from a long PDF?
Work chapter by chapter. For a quick map of the whole document first, use a comprehensive summary, then take notes per part.