“The ThemeShaper WordPress Theme Tutorial: 2nd Edition” is the new upgrade of ThemeShaper’s super popular WordPress theme development tutorial. It now contains new code samples, better practices, and, well, you just have to take a look yourself. It’s very comprehensive.
“The WordPress Settings API” is a comprehensive, clear guide by Konstantin Kovshenin. This should be the go-to page for my Settings API learning in the future.
Cliff Seal shares his WordPress development process.
“Key Differences Between Validation and Sanitization” is a good development article, too. I’m more surprised that it’s published on the WordPress.com VIP blog, there’s one new feed to subscribe to for me.
“Utilizing User Roles In WordPress” is a Smashing Magazine article, so there’s a good chance that you’ve heard about it already. Instead of, you know, reading about it just now from a small WordPress blog. But anyway. Have a look.