On Sundays I normally publish a photo challenge in black and white that I call Black & White Sunday. I usually come up with a fresh theme for it, but once a month I publish a recurrent (monthly) theme: after and before where you are supposed to show the same photo, regardless of the subject, in both monochrome and colour.
This is a way of encouraging you not only to set your camera to black and white setting, but to shoot in colour and to convert it into black and white in post processing. I think that this may be a good exercise in seeing. Hope you will join me. Remember, any subject is OK as long as you show it both in colour and black and white. Wishing you all a beautiful day!