That's not the most popular opinion, but: I don't.
That's especially true in meetings, I have a simple rule for this: if it's interesting and/or useful, I'll remember it. Which means that if I have to take note of something, it's most likely because it's useless and/or uninteresting and I'll never come back to my notes anyway.
Although that's mostly because the only way I have to take notes during meetings is paper, which I don't like for that kind of things (mostly because it lacks Ctrl+F 😀), if I had a computer I'd just put some notes in a Markdown file or a Google Keep note, if I need to.
As for brainstorming, the output is often something more concrete than just "notes" (more like a draft of a more complex document or a schema).
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