I've been working on a small collection of short stories. When I'm stuck, sometimes I write through it, whether it makes sense or not. With that, I can only get so far and then I step away and go to something that does work. I may give myself a couple of days, if it takes that and go back to it. The thing about that is, I'm constantly thinking about it, so by the time I sit down again, I feel okay about what direction I need to go. I've heard pros say if you know how the story will end, the story is that much easier to write, so maybe think about an ending first. if you can imagine that. I've not quite managed that yet.