Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M0193

The 1-3-5 Rule

The 1-3-5 Rule
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Each day, plan to complete only: 1 big thing (main task), 3 medium things (secondary tasks), and 5 small things (trivial tasks).

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Slim down your to-do list. A to-do list is not a wish list. By limiting the number of tasks, you force yourself to go through the painful process of prioritizing in the morning, avoiding the pretense that you can do everything.

anchor

Anchor fast decisions

Based on 'limited cognitive bandwidth' and 'priority inertia'. People have limited effective deep work time each day; the more you list, the easier it is to fall into pseudo-busyness. Limiting the number to 1-3-5 forces you to make painful trade-offs during the planning phase, focusing your energy on high-leverage tasks.

MINIMUM ACTION

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Practice this model in one real situation:

Check to track your progress (stored locally)
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Source support: Explicit

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