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rogerd - 2:33 pm on Sep 21, 2010 (gmt 0)
I'd stick Google Analytics in right away (assuming you aren't paranoid). Free and lots of detailed info.
As far as structuring your content, it's no different than any other site. Before you start creating pages, you need to determine the best structure, e.g., content silos built around keywords, content organized by user interests, etc.
It's always best to imagine what your site will look like a year or two down the road and create the architecture for your content accordingly.
If you plan to use an SEO product like vBSEO, you might as well install that from the start. You CAN install it later, though, and still get the benefits without breaking inbound links.