That's true, though for myself I find that in order to concentrate on something mentally engaging I need to be physically occupied. So walking, simple chores, s

That's true, though for myself I find that in order to concentrate on something mentally engaging I need to be physically occupied. So walking, simple chores, some types of exercise, knitting, mindlessly guitar practice. It's when I don't have something mindless to do with my hands that my mind actually ends up wandering.