<ul data-eligibleForWebStory="false">A 'second brain' is a digital system that helps capture, clarify, and connect thoughts seamlessly in the AI era.Notion, Obsidian, Roam Research, or note apps can function as this external mind extension.Offloading cognitive overload with a second brain allows for improved focus on deep thinking and creativity.AI assistants like ChatGPT can enhance the second brain by aiding in organization, brainstorming, and content generation.