Do you get stuck in places within your story/manuscript? Do you sit and wonder what went wrong during the writing of your story after everything had been going so smoothly? Why did you get stuck all of a sudden? Why the brick wall that popped up and hit you head on?
Maybe it has to do with information being in the wrong place. As you know, a novel/story is broken down into three acts with act two being broken down into two parts (the chase and the attack). What happens when you are writing and part of what you wrote should be in another act and not the one you are currently writing in? You get stuck. The story is no longer clear in your mind. The result is, you sit in front of your manuscript wondering what to write next, or you try to figure out what happened that put a stopper in your otherwise smooth writing experience. The answer could be, part of what you wrote belongs in another act. So, try to move your text in question by trying in out in another act. If it is something that belongs in act three, and you have not written act three yet, save it off to the side for later.
Another answer is that it does belong in the act you are currently writing, but it is in the wrong chapter. For example, for a couple weeks I was stuck on a couple of back to back chapters. The story was making no sense to me. The clarity was not there, and up to that point it had been. Then I realized that one of those chapters belonged in front of a chapter three chapters up, so I moved it. This particular chapter had two scenes in it. Both had the same two characters in it, but time elapsed between the first scene and the second. When I moved the chapter up three chapters, everything began to make more sense. Then, when I started reading the second scene within the moved chapter, it made no sense anymore. I sat and played around with the chapter in my head and after about five minutes, I realized that the second scene within that chapter belonged in another chapter further down, so I moved the second scene in that chapter down two chapters and put it as a second scene within its new chapter. A-HA!!! Now everything made sense.
So, next time you get stuck, before you delete and start over, move your text around.