Hitting the Wall...
It happens to the best of us...Writer's block, what do you do when you hit that wall. I have found it helps to take time away from writing. A day, week, sometimes a couple of weeks. Do not think about your book at all. Your mind needs a break.
Putting down the writing material for a few weeks can help you have a fresh perspective when you sit back down. Most of my storytelling takes on a whole new life because I took time away and came back with a fresh view of the characters and storyline.