Andrew Huberman· PhD
And the way to do that, if you're sighted is with your eyes. That as your attention drifts, and you look away you want to try and literally maintain visual focus on the thing that you're trying to learn. Feel free to blink, of course, but you can greatly increase your powers of focus and the rates of learning which is anchored in all the work of Merzenich, Hubel and Wiesel and others.