I wrote a post on using colour palettes and creating a mixin from them using Sass last night.
I really love all of the boilerplates/frameworks and starting points that pop up daily. They give great insight into how other people like to code and work. This may or may not work for you and you can or can not use one out of the box. For me I really like granular control of what is in my 'starting point' set of files. So I made this - a slightly bizarre starting point - a set of files and folders to 'get me going' on client and personal projects. As a bonus there's also a starting point for the Perch CMS and a starting point for Mixture.io
Ages ago I wrote a LESS mixin that would calculate the font-size in REMs with a PX fallback and also give a line-height and margin-bottom (in REMS with a PX fallback). I updated this today to include a basic mixin for just font-size and for font-size w/ line height
After reading a post where I saw the viewport meta tag being 'bastardised' (in my opinion) I wrote a post on why not to and what to do instead