The way a poem begins for me always varies. Sometimes it can be an image, something I dream of or something I witness. It can also begin with a line: frequently I have the first line of a poem and I don't know where it will lead to but usually if I write it down and concentrate on it, I do get more lines that I can work with. Sometimes a poem can also be inspired by a piece of music for me or an experience - travelling for example has sometimes led to unexpected poems. So there's no one thing - almost anything can inspire a poem, even reading the newspaper, I might read about something to which I respond to with a poem.