Make a list of what WOULDN'T happen next.
In the novel I am writing, I was at a very stuck spot where I wasn't sure where to go. I knew I wanted this character to change, but I wasn't sure how to make him change and have it be believeable because this character is very evil. I started making a rather lousy list of what wouldn't happen next, and got a brilliant idea. I may not use it, but I'll keep ploughing on. I think this technique works!