Why Writing Can Be Like Shuffling Cards

I made an important decision yesterday regarding the book I'm currently writing. It's only my second novel, and, like the first, it's taking a while to write. Fortunately, I am getting closer to the end of a rough draft. Yesterday, however, I made a decision about the structure of the novel, a change that is requiring some re-shuffling and re-ordering of events and chapters. A scene I was going to include about two-thirds of the way into the book is now going to be the climax. It's a good decision and the right place for that scene to occur, but now I have to re-shuffle the deck a bit. I had to do that a lot with Blueberry Cafe and I used index cards and put a phrase on each one for a chapter or a scene and then lined them up on the floor and moved them around until I got them the way I wanted them. I guess I may be pulling out the index cards again.