If nothing is coming easily, I usually walk away from the story and take the dog for a walk. It's amazing what pops into your head while you're walking. Sometimes the solution comes at night in my dreams. There's always paper and pencil next to my bed - or I'll forget all about it in the morning. And... if I have written a character into a corner, I throw it out there to friends and family. We have great brainstorming sessions - some are quite entertaining.