The Principle of Atomicity
If you don’t have any idea about the principle of atomicity, start with the Complete Guide to Atomicity. It will provide all the bells and whistles associated with this principle. For a teaser summary: Atomicity marries the Zettelkasten Method with principles of sound thinking. Atomicity is one step in your journey. Note-taking is no longer a chore. It becomes a discipline. Each atomic note is a training session for the craftsmanship of knowledge, bringing you one step closer to mastering knowledge craftsmanship.
The Complete Guide to Atomic Note-Taking

Atomicity refers to the concept that knowledge is composed of discrete, fundamental building blocks. The Principle of Atomicity is a processing direction in note-taking, aiming for one knowledge building block per note. It is not a rigid law, but a guiding compass. It needs to be contextualised for each application.
Create Zettel from Reading Notes According to the Principle of Atomicity

This is the original article that coined the principle and brought the idea to the context of working with a Zettelkasten. It is a classical read.
The Principle of Atomicity – On the Difference Between a Principle and Its Implementation

This article provides an in-depth explanation of how to approach atomicity as a flexible principle rather than a rigid law. This article sets up the stage for the complete guide to atomicity. However, it is better to read this after the complete guide.
Upgrade Atomic Thinking to Holistic Thinking

Breaking ideas down into their atomic parts is just one direction of thinking. In this article, you'll find ways to re-integrate what you isolated.