[heroHACK17]

Taking a 10-20 minute break to practice non-sleep deep rest immediately following a period of intense focus (~90 minutes or so) has been shown to increase rates of learning of whatever you were doing during the period of focus.

[User23]

Is this why I retain so much of my high school and early college education? I deep rested so hard my face hit the desk once per lecture or so, but I can still tell you about what the professor was teaching.