A second brain is meant to hold the things your actual memory cannot reliably keep: facts, half-formed ideas, references you’ll need months from now. Most attempts fail not because the system is wrong, but because it becomes another place to dump information you never retrieve.
Managing multiple client accounts at IBM, I kept notes on every conversation, every requirement, every commitment made. For a while, that meant one long, undifferentiated file per client, which made finding anything later nearly impossible. What worked was organizing by what I would actually need to act on, not by chronology: open commitments, key contacts, decisions made and why. Suddenly the system answered questions instead of just storing facts.
A second brain organized the way your memory naturally works, around topics and projects, fails the moment you need something specific under pressure. Organized around the actions you will need to take, it answers exactly the question you are asking when you open it.
Before adding one more note today, ask what specific question you would want this system to answer for you next month, and organize today’s note around that question rather than around the topic alone.
