Free resource · Walk-through

Summarise a long document properly

How to turn a long report, contract, or thread into a short summary you can actually trust — and how to check the AI did not quietly miss the important bit.

Free, and free of a catch. See the whole library.

The catch with AI summaries

AI is genuinely good at summarising, which is exactly why it is easy to get burned. A summary always sounds complete and confident — even when it skipped the one line that mattered, softened a risk, or missed a deadline buried on page 12. So the goal is not just to get a summary. It is to get one you can trust, and to spend thirty seconds checking the parts that count.

Step 1 — Ask for the summary you actually need

A good summary depends on why you are reading. Tell the AI what you are looking for, and paste the document.

Summarise with a purpose

Summarise the document below for me. I need to know the main decisions, the risks, and anything I personally have to do or reply to. Give me: a three-line overview, then the key points as short bullets, then anything that looks important but easy to miss. Do not add anything that is not in the document.

[paste the document]

Swap the second sentence for what you actually care about — the key dates, the costs, what changed since the last version. 'Anything important but easy to miss' is the line that catches buried deadlines and quiet catches.

Step 2 — Make it show you where things came from

Before you trust a key point, ask the AI to point to where in the document it found it. This catches the things it invented or misread.

Check the important bits

For each of the key points and dates you listed, quote the exact line from the document it comes from. If you cannot find a line that supports it, say so.

If it cannot quote the source line, treat that point as unconfirmed — that is where summaries go wrong.

Step 3 — Ask what it left out

A summary is as much about what is dropped as what is kept. Ask directly.

Find the blind spots

What did you leave out of the summary that someone in my position might actually want to know? List anything you cut that could matter.

This often surfaces the caveat, cost, or condition the tidy summary quietly dropped.

The rule for anything that matters

For a newsletter or a long thread, the summary alone is fine. For a contract, a medical letter, a financial report — anything with a real consequence — use the summary to find the important parts fast, then read those parts yourself. The AI gets you to the right page in seconds; your own eyes do the trusting.

Go deeper

This is one of the everyday work jobs AI is quietly brilliant at. AI Productivity Mastery, part of The AI Mastery Series, covers the rest — inbox, documents, research, and more.

See AI Productivity Mastery on the ladder

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