CSS has the dual benefit of being incredibly powerful but also very easy to learn. However, it is an incredibly forgiving and lazy language which can hide a multitude of sins. Writing good, efficient CSS can be complicated but fortunately Sass can help us out. Sass is a tool that takes a lot of the legwork out of writing good CSS. This pocket guide will provide an overview of how Sass can dramatically improve your workflow and make your CSS more flexible, robust and reusable.