Two years ago, approximately, I was browsing drawing and sketching books at the lib. I picked up and checked out one that described a form of doodling called zentangles. I started following the exercises in the book. It was one part ceremony. (eg. it suggested you should feel gratitude for the paper, and your pens and pencils), one part rigorous rules, and one part ‘go with the flow’.
So far the ceremony parts haven’t really stuck, however, I really enjoy the balance between ‘go with the flow’ and process. It seems to have the right amount of random for me. I have recently found the discipline to do them on a regular basis. I’m not prepared to say they are meditative, however I do quite enjoy the ritual of them.