Using a CSS Preprocessor is the best way to style your themes. Tools like SASS(scss), LESS, Compass and Bourbon take a lot of the grunt work out of CSS (I’m looking at you vendor prefixes) and make structuring your style sheets much easier. I will start by giving a run down on the tools at our disposal, explain the benefits of using a CSS preprocessor, and which ones to use. I will then demo how to incorporate a CSS preprocessor into your workflow and how to set up a theme using SASS(scss).