A critical part of any Seo Strategy should be Social Network Analysis (SNA). When you pick your niche one of your first tasks should be to kick off some SNA of to the top social networks in your niche so that you can strategically spend your time getting to know the right people.

What you are looking to do is figure out who are the real influencers in your sector, lets take SEO an an example. If we have a quick look at sphinn we can quickly gleam some useful information on where we should spend our time if we wanted to get integrated quickly into a community.