Is it a particular topic or fandom? My worst block on stories come when I’m trying to force a story and refusing to work on something else. I feel bad for stuck stories, but getting mad makes it worse. Most often I break block by working on a new story, often silly/satire. I have to be careful that these side stories don’t take a life of their own as I have too many active stories. I get really stuck when I think I SHOULD work on my more meaningful big stories and then I get stuck across the board. My muse just gets bored, frustrated, and doesn’t like being told what it should do by planning. Right now I’m doing cleanup on all the drafts I did for NaNo and one plot bunny sticking Vader in something like Quantum Leap (no Al) taht is running short and fast.
Write anything, even a blog journal, to get the words moving...