Chris,
First line - if you just Preview or Export locally, the link fails if you have no Internet or if the site does not yet exist.
Second line - include Redirect /index.htm /; the index.htm file URL is never accessed so only one page gets trawled.
Third line - most of the good stuff comes free with Google's WebMaster tools.
Don't overthink SEO: good content, small pages, named images, structure.
Acorn
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