With this fairly new discovery, its time to apply it with regard to obtaining better focus on our subjects. Looking back at instances via Nikon View NX, I can now confirm that those fuzzy shots all have low-contrast points selected! No wonder the Nikon D90 could not really make out a sharp focus.
So, here you are, the baby discovery in focusing technique I found today.
OK. I am off for a short hike with my boys now...to do more shots along the sea coast.