Hi there! Nice post.
You where talking about “The Rule Of Thirds, Symmetrical Composition, Diagonals / Lines...” and so on...and then asking for some ideeas for a post. I think you could do a series of them, with photos for every rule of composition, using rewarded photographs, and draw on them the “map” of the rule/rules used in that photo, so that people can better understand them, and maybe use them when they use a camera.
Have fun!