The subconscious, when it realizes you have taken a bad path, will just bog you down and stop you from typing. What I do when this happens is simple. I look back at what I have written in the last three or four pages. Writing past an ending on a scene or chapter is usually very, very clear. The ending almost always just pops off the page. So I cut off the extra typing, do the scene or chapter break, and head forward with the characters.
