Prototyping tools can be restrictive and it's becoming more important that designers know how to code up their concepts, so Leisa Reichelt organised a workshop teaching how to build prototypes in HTML and CSS. Here Anna Debenham summarises what she taught on the Code Fitness day

Freelance interface and frontend developer Mike Byrne, also part of the Area 17 technical team, explains how he structures his CSS and why

Embrace the secrets of being lazy. Learn how to write less code while getting more done. Become adored by your project manager for finishing projects faster. Lazy coder Aaron Morris, interactive developer at Jam3, gets you started

Parallel to the ideas behind Sass and CoffeeScript, Haml turns your markup into veritable haiku. Nick Walsh of Envy Labs shows you how to get started, with or without Ruby

In this extract from his SitePoint book PHP & MySQL: Novice to Ninja, which is on sale now, Kevin Yank offers a beginner’s guide to this server-side language

Speed up your sites with these tips for slashing the time it takes to execute your code, particularly in older browsers, provided by Joe Angus from We Love

Make simple games without code and learn to program as you go along. Gavin Smart introduces GameMaker: Studio