Creating metaphors in poetry

When writing poetry, is there a known method of some kind that exists that makes it easy to turn a concept I'd like to illustrate into a metaphor? If so, please elaborate as much as possible.

EDIT:

I am asking if there is a way to come up with metaphors quickly and easily, so that if I want to illustrate a concept or a thought or a feeling I can quickly come up with a solid metaphor, rather than ask and puzzle about it.