My inspiration comes from so many things, it is hard to give credit to one. I find music of all kinds to be a great inspiration. A melody or a lyric can fire my imagination. Exercise is another. Endorphins fuel my thoughts - I tend to work out scenes and dialogue when I am exercising. Reading is also a great inspiration.
A writer is always, always searching, even against her will, against all her better instincts, for the thread of a story. Everything is fodder. Everything is fuel. You can feel it coming on like the tingling of a sore throat. The brain never stops struggling to reshape every experience and feeling into a coherent narrative.