The document discusses several options for creating mobile sites using Site Manager: 1. Creating a mobile version of an existing site using a separate channel and responsive design with CSS media queries. 2. Adding a new mobile channel to an existing site structure to reuse content with a separate mobile style. 3. Creating a new mobile channel and site structure for a mobile-specific design using frameworks like jQuery Mobile. 4. Developing a mobile site as a subsection of an existing site for a separate mobile structure while linking back to the main site. The document recommends considering cross-platform compatibility, HTML5 features, and JavaScript frameworks to enhance the mobile experience.