I have a pretty clear idea what'll happen in the first few chapters, an overview of how the situation progresses, and a few specific events and conversations that need to happen along the way. The main issues with chapter one are things like deciding exactly where to begin, and whether a few characters will meet the first evening or not until the next day. Mostly stuff that's best solved by just writing it down to see how it looks. I just keep distracting myself because I have an irrational fear of making decisions :D