How does an idea come to you?
For instance, if you're a poet (Lisa B., Radagast) how does the poem start? With an image? A word? An impulse? Or if you write short stories, how does that happen? And why a story and not a personal essay? Or novel? And if it is, in fact, a novel, when and how do you know it's a novel?
In other words, I want to know what your harvesting/beginning process is like. Discuss, please.