One of the most difficult aspects of my OCD to see clearly is the seeking of a "just right feeling." It pervaded my life. There's a stereotype of people with OCD being driven to straighten crooked photos, but "just right" OCD can attach to things that have no discernible order. Mine most often manifests as "how I started my day doesn't feel right" and moves rising anxiety, followed by the compulsion of freezing in place, trying to undo the feeling of having ruined the day. It's very vagueness is what makes it difficult to articulate even to myself. It's like I have a faulty shut-off switch, and the urge to move on doesn't come, or I'm expecting it to be incredibly dramatic.
When I was in college I noticed how I felt compelled to finish certain things in all one sitting, or I felt anxious. I think some of my procrastination came from avoiding starting tasks that would then need to be done straight through, because the thought of taking a break filled me with apprehension. My feared consequence is that the anxiety would overwhelm me, or that I wouldn't be able to pick up where I left off if I took a break. I did have some self-awareness that it was irrational to require myself to read all the chapters in a book, if the prof had only assigned 3 of them. But I didn't know how to stop.