Ira Glass, producer and host of the radio show "This American Life", put together a short video about "The Gap", which any creative person experiences at one point or another. The Gap happens after you've had an idea and a project has been started, but you are now in the middle of it and don't quite know where you are going and how it's going to turn out in the end. This is the point at which you get frustrated and begin to lose faith in what you are doing. Thoughts of quitting arise. Doubt gnaws at your brain. Here's a link to the video.
Right now, I am in The Gap with my current project. And the only way to deal with it, as Glass says, is to just keep going. Keep making work. Keep shooting, processing, printing, questioning. Just keep moving forward.
In past experiences with The Gap, I've discovered that it may last a short time, but it also can last for quite a long time. Regardless of how long it lasts for any given project, one has to have faith that it will all work out and that the end result will be satisfying. And if it isn't, well, then isn't that something we can learn and move on from as a starting point for what we do next?