Where to look? Lift up your head, and turn to smell the roses. Habit of the week

Let's take our gorgeous upright posture out for a spin. 

About 6 year ago, I did some safety and self-defence training with a policeman, Phillipe.  This is his safety perspective.

When you walk take into account the long distance view, the middle distance and the immediate view -  all three.  You can do all that if you look into the longer distance, and use the peripheral vision for the rest.
He was an observation savant. His focus was incredible. He would,for example tell me to look around. I would notice that there was someone across the road, bravo me,  but then he wonder if I had seen what was in the person's left hand.
Did I not see that?  Me? no sorry. 
Just like when a bird flicks by, Don says "Did you see the golden eye on that bower bird?"  I say "oh, Birdie".

Anyway, keeping your line-of-sight up, not down, keeps you safer.  You notice more. 
So I tried it on my morning walk.  I can report that I definitely remembered my posture  I hadn't realised that when I am deep in thought or listening carefully, my head drops down. Then having lifted my head up, glided my chin in correctly, I noticed a lot more of my morning walk surroundings. In fact,  I felt secure enough to turn my head a few degrees from side to side as I walked.  A positive result.