Opinions and advice on code quality ; note that some of these are conflict

• Sandi Metz' Rules For Developers
• How much should global variables cost? a list of design flaws and associated costs - a little crass at times, skip if easily offended
• The Software Inferno Dante's tale, as experienced by a software architect
• Things every practicing software engineer should aim to know
• Comments on Doom 3's source code - for this class the discussion here isn't as useful as the other articles, but I've included it for relevancy to game development