This weekend I hit a mental milestone on THE PEDDLER'S PACK: 20,000 words.
Never mind that I have not yet figured out how to give my hero a life as a peddler. Oh, no--the locals all think he's a knight who's lost most of his gear in a shipwreck off the rocky coast of Cornwall. How do I get him from swordless chevalier to competent merchant? I have no idea, though bubbles of a solution are beginning to form in my brain.
Plotting is always a challenge for those of us who write seat-of-the-pants. What about the rest of you? How do you get your charming characters from point A to point B, and beyond, when you've written X amount of the story, hit your milestones, and you've no idea how to get them to "the end"?