The one I found works best for me is called Choiceless Awareness, or Nonjudgmental Awareness. As you’re going about your daily business (hopefully, there’s some nature) and you’re not talking to anybody else, you practice learning to accept the moment you’re in without making judgments. You don’t think, “Oh, there’s a homeless guy over there, better cross the street” or look at someone running by and say, “He’s out of shape, and I’m in better shape than him.”
