Do you want to know how to retain anything you, yourself, are trying to learn?

Teach someone else.

A teacher, after all, is nothing more than a professional learner. Any teacher worth her salt will tell you that the greatest learning comes when one knows one will have to teach the material being learned to someone else.

The next time you find yourself reading a book, taking a course, or watching a video lecture, imagine that the reason you are learning the material is so that you can teach it to a small group of people in 48 hours.

Better yet – actually teach it to a small group in 48 hours. If you can’t get a group together, then teach a few people individually. If that is impossible, then write a blog post, or record a quick video lesson, and publish it.

“To know, but not to do, is really not to know.”

–Stephen R. Covey

To know and to do, but not to teach? Well, that’s just not right.