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Deep Work Block (90 minutes)
Reserve a 90-minute deep work block offline and produce quality work that equals an entire ordinary day.
Goal
Enter 90 minutes of continuous deep focus to produce high-cognitive-value work that cannot be produced in distraction.
Steps
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1
The night before, define the session goal in one specific sentence on a physical card.
Expected Outcome
Immediate
In 90 minutes you finish what used to take half a day chopped up by meetings and messages.
Evidence base
School: Deep Work / Cognitive Science
Founders: Cal Newport · Anders Ericsson (2016)
Cal Newport's methodology from Deep Work (2016) drawing on Anders Ericsson's deliberate practice research showing 90 minutes is the sustainable ceiling for high concentration before rest is required.
Keywords
Frequently asked questions
How long does "Deep Work Block (90 minutes)" take?
This exercise takes about 90 minutes, practiced solo in a Behavioral format.
When will I notice the effect of "Deep Work Block (90 minutes)"?
In 90 minutes you finish what used to take half a day chopped up by meetings and messages. In the short term: After two weeks of one daily session, your knowledge output (writing, code, analysis) triples.
Is "Deep Work Block (90 minutes)" evidence-based?
Yes — it draws on Deep Work / Cognitive Science (Cal Newport, Anders Ericsson (2016)). Cal Newport's methodology from Deep Work (2016) drawing on Anders Ericsson's deliberate practice research showing 90 minutes is the sustainable ceiling for high concentration before rest is required.
Is "Deep Work Block (90 minutes)" suitable for beginners?
Its difficulty level is: Intermediate. No external tools required — it can be practiced directly inside the app.
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