netmeg - 8:24 am on Mar 14, 2013 (gmt 0)
If I'm serious about a niche or topic, I usually already have done the research to know where the influential blogs/sites are in that space. But if you haven't, you can start by looking at who else is ranking for the keywords and concepts that you are, or that you want to rank for.
Guest blogging, properly done, is not the same as article marketing or footer links, as mentioned in that video. Nothing like it.