Pareidolia \ˌper-ˌī-ˈdō-lē-ə\ -" the tendency to perceive a specific, often meaningful image in a random or ambiguous visual pattern." Mirriam-Wbster

ArtistsNetwork has an interesting article by Gigi Chen about pareidolia and how to use it in your artwork.  Maybe it was interesting to me because I see faces and figures in everything, shadows, towels, clouds, etc.   The goal of the article is to encourage you to notice more in your daily life and act on it in your art practice.  Ms. Chen would take photos when out in nature and later look at the photos and see what images she could find  in the photo and then she would incorporate her image into her artwork.  Here is an example from the article

by Gigi Chen

I think it's a brilliant idea for days when nothing comes to mind to do in your art practice.  It's a fun article check it out!