Have you tried chatting about it, or even role-playing?
This character was idly role-playing in a comment strip and was asked a question.
At the time I was in the moment but later I could hardly believe that I'd come up with several unusual ways to kill a vampire, including at least two ways to kill a vampire while it is travelling as smoke. (There was also a pseudo-scientific explanation of why those would work.)
I don't think I'd ever given most of it conscious thought, but it could be a great way to unstick...