If you're using the WordPress Seo plugin by Yoast you should already know that you only want to allow the search engines to index your
Split Large Posts Into Multi Page Posts Using The Next Page Link Tag
Sometimes its better to split large posts into separate linked posts in order to satisfy your readers attention span. You can do this
WordPress Multisite – Creating a Network of WordPress Sites
WordPress multi site enables you to create a network of unlimited WordPress sites which also share the same WordPress installation, theme