Personal knowledge management (PKM)
- Industry term
Personal knowledge management (PKM) is the habit of capturing, organizing, and reusing what you learn and come across, so it stays findable when you need it instead of scattering across apps.
Finding something later depends on remembering which chat, inbox, or app it went into, and a year on that memory is often gone. The habit takes remembering out of the search. You keep one place you search first, and each saved item carries enough context to be found, such as its source, date, and purpose.
Where you’ll meet it
Every January you dig through old emails for last year's insurance renewal terms, the kids' vaccination dates, and the name of the contractor who fixed the roof. Each search starts from scratch.
What to do
Start with those three, since you already know you'll need them again. Ask your email assistant to find each one and save it as a note with the date and a link to the original email. Then search your notes for each, so you know next January's search will work.
Easy to mix up
| Personal knowledge management (PKM) | Second brain |
|---|---|
| No, it covers any approach, from folders to linked notes | Usually, the method in author Tiago Forte's book “Building a Second Brain” |
Check yourself
Last spring you saved a note titled “Good advice,” holding a pasted paragraph on asking a landlord for a smaller rent increase. This spring you search your notes for “lease renewal,” and it doesn't turn up. Which habit would have brought it up?
Go deeperOlder note-taking methods meet a new risk from AI summaries
Jason Frand and Carol Hixon at UCLA's business school described personal knowledge management as a skill in 1999. Older methods feed into it, such as the sociologist Niklas Luhmann's slip box, or Zettelkasten, a cabinet of linked index cards.
An assistant can save and sort notes for you, and that brings failures of its own. A summary saved in place of its source can drift from what the source said and then get trusted months later, and duplicate notes split what you know across copies, so a correction made in one leaves the other wrong.