Avoid putting your torso in front of your head.
This tip looks at the three previous tips from a different perspective. In the previous tips (38, 39, 40), the above images were used to explores the problem of reaching with the torso instead of the arms. But the exact same problem can also be described as the torso pushing in front of the head. In general, you will feel better if you leave your torso behind your head.
More on Your Head & Torso
Video: While Looking Up, Don’t Pull Down
Video: When Walking, Lead with the Crown of Your Head
Video: When Bending, Keep Your Head Away from Your Heels
Video: Improve Computer Posture
Isaiah Mustafa (the Old Spice guy)
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