In this video tutorial, we will show you how to use the free LESS app to compile code for a website. We explain how to find the appropriate .less files to use and how to get your code set up properly.
In addition, we help walk you through the troubleshooting process when parts of the site look unlike you expect when doing the conversion. (This includes elements such as stray underlines or missing text.) In a simple step, he shows you how to both find and correct these problems in this tutorial.
Transfer CSS to LESS when Building a Website with Startup Framework - http://designmodo.com/less-startup-framework/
New tutorial by David East on Designmodo.