Traditional HTML website planning techniques fall short when used to plan a Drupal site.

In an article comparing WordPress, Joomla, Drupal and Plone, Idealware said "The flexibility of the [Drupal] system means it's important to think through the best way to accomplish what you want before diving in."

Drupal Websites: A Planner's Guide is being developed to help you "think through" what you want and need before diving in with development decisions.