Building A Second Brain is a methodology for saving and systematically reminding us of the ideas, inspirations, insights, and connections we’ve gained through our experience. It expands our memory and our intellect using the modern tools of technology and networks.

We are already doing most of the work required to consume this content. We spend a significant portion of our careers creating snippets of text, outlines, photos, videos, sketches, diagrams, webpages, notes, or documents. Yet without a little extra care to preserve these valuable resource...