I did do some work in my sketchbook, I just didn't get around to blogging about it. Having said that it is pretty basic. Still, it is something I can come back too at a later date.
I thought about people looking in the opposite direction from each other. Having directional dxylesia means I do this on a regular basis. I then wrote a list of words, with small illustrations and thought of the opposite of each.
Finally, the two most opposite things for me are day and night.