When you write something in chunks, and then you go back and read it straight through, you may find that you have repeated a word or action to the point of silliness. Such is the case with me. While editing a portion of my WIP where one of the main characters is going in for surgery, I noticed that every single person who came in to see her was kissing her on the cheek. If I got kissed that many times, I'd start slapping people.
That scene was originally written in small tidbits, stuck in between changing diapers, making lunch, changing the laundry loads, and what have you. Reading it straight through just now was quite a trip.
Writer's tip for today: It's okay to write in chunks, but try to edit in longer stretches so you can get a more clear idea of the big picture.