Posture - I can't disagree with this (for once).

What looks like a plumb line?

I liked the research about the link between posture and mood. (Fake it till you make it.)

I liked his hints on placement of screen and keyboard.

The ribbon trick could be useful to some as a reminder.

The back exercise is pretty consistent with the WW upper back, but we use it as a posture guideline, rather than as an isometric exercise.

Sure, he has left out lots of elements of the sitting posture, but is there anything in the post that is actually wrong?

The site takes you to http://improveyourposture.com, where you will see the plumb line on the cover of the book and read about engaging the abs.

Oh dear, yes, I see what you mean. I was only reading the blog, and didn't go to the site. Even if the blog is basically sound advice I can't go along with the main site either. Just dreaming. ;-)