• What is Sass and why should you use it
• File organization, including WordPress-specific considerations
• Sass best practices, including WordPress-specific considerations
• Using a task runner (grunt/gulp) and development best practices
• Thoughts and considerations for parent/child themes
• Incorporating 3rd party libraries and frameworks
• Exposing styles to WP Admin for better WYSIWYG display
• Thoughts and considerations for development vs production CSS
• Debugging CSS issues in the Sass
• Mention of PostCSS and how it can complement Sass

Slides for this talk are also available in downloadable form from this link.