The document discusses strategies for managing changes when using a staging environment for a Drupal site. It recommends using source control to manage code and configuration changes, and exporting database structures and content to code using modules like Features and Exportables. This allows changes to be reliably deployed to multiple environments. It also discusses using deployment tools like Drush and Capistrano to promote changes. While content staging is still challenging, Drupal 8 aims to improve this with a robust entity API and native UUID support.