30 second life changing habit

This is a new one.  I very much like the premise and have never hear of it before.  The blog post sounds like it is written by a nonnative speaker, but who cares.  The concept of editing being crucial and very difficult makes this post very believable to me.  Her blog looks very interesting.

Immediately after every lecture, meeting, or any significant experience, take 30 seconds  — no more, no less  —  to write down the most important points. If you always do just this, said his grandfather, and even if you only do this, with no other revision, you will be OK.

1. It's not note-taking: Don't think, just because you write down everything in a meeting, that you're excused from the 30-second summation. Though brief, this exercise is entirely different from taking notes. It's an act of interpretation, prioritization, and decision-making.
2. It's hard work: Deciding what's most important is exhausting. It's amazing how easy it is to tell yourself you've captured everything that matters, to find excuses to avoid this brief mental sprint  —  a kind of 100 meters for your brain.
3. Detail is a trap: Precisely because we so often ostensibly capture everything, we avoid the hard work of deciding what few things count. So much of excellence is, of course, the art of elimination. And the 30-second review stops you using quantity as an excuse.
4. You must act quickly: If you wait a few hours, you may recall the facts, but you lose the nuance. And this makes all the difference in deciding what matters. Whether it's the tone in someone's voice or the way one seemingly simple suggestion sparks so many others or the shadow of an idea in your mind triggered by a passing comment.
5. You learn to listen better and ask better questions: Once you get into the habit of the 30-second review, it starts to change the way you pay attention, whether listening to a talk or participating in a discussion. It's like learning to detect a simple melody amid a cacophony of sound. And as you listen with more focus and ask better questions, which prompt actionable answers, your 30-second review becomes more useful.
6. You're able to help others more: Much of what makes the 30-second cut are observations about what matters to other people. Even if the purpose is to help better manage different interests in future conversations, it also helps you understand others' needs and so solve their problems. This does not surprise me: in months of interviewing people who make generous connections, I've been struck by how many have their own unconscious version of the 30-second review: focused on the question of how best they can help.
7. It gets easier and more valuable: Each time you practice, it gets a little easier, a little more helpful, and little more fun.