How to Find a Guest Blogger?

The other area that some creaters are interested in pursuing is being a guest blogger on somebody's blog or mediosite. Can you walk us through, what is the best way to handle that? Or how would we go about finding the right contect? It's doing your research, knowing exactly what the blog covers,. If it's going to be a good fit, if they cover um or help except other guess blog posts. And surveying your target audience. What blogs do they love? What where are you seeing the key words that you use for google appear more often?