Okay, maybe a minute is too long, but certainly you've got 30 seconds for a habit with a lifelong impact:
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 okay.
I must do something like this unconciously as there are so many conversations or situations where I cannot recall the exact details, but I can usually remember the key takeaways. This generally works well for me, though taking a moment to write it down couldn't hurt.
That said, people might have different ideas about what is important. This is where I sometimes run into trouble, but as the article suggests, you'll get better at figuring this out over time.