A few days ago, I finally got some time to work on "GERTA!" I have 45 pages written so far. I know. I have a long way to go. But, I need to confess, this is a 4th or 5th edit of this part of the book. It's the ending that I can't seem to get.
That brings me to a technique I learned in a creative writing course in college. For my Communications requirement I signed up to a Communications class (imagine that). The professor had one requirement -- write 1000 words (real tough). It could be about anything as long as it made sense and communicated some idea. Seeing my work, he suggested I enroll in a Creative Writing class. It was half way through the semester, but I agreed. I didn't get much in the way of lasting ideas, but one thing he taught me is this:
For the final test in the class, he wrote two seemingly unrelated sentences on the chalk board. He told us we had to begin a short story (500 words) with the first sentence and end it with the second sentence. That, I have to admit, was a tough challenge. The two seemed to have nothing to do with each other. But I began, knowing I had to connect them somehow. Well, to make a long story short, I got the only "A" on the test, and one of the few in the class.
So, since then, I've tried to write all my fiction that way. Create a hook for the opening, then work toward the final that I've pre-created for the story.
Maybe that bit of advice will help you too.