There's lots going on with HTML5. Get the latest from the folks at Ajaxian. First, find out What's New in HTML5 (The WHATWG Blog), then look into the new Microdata Spec. There's a Sticky Notes Tutorial, and an examination of the Canvas Tag. Getting the nitty gritty details right.
Steve Souders works on web performance and open source initiatives. His book, High Performance Web Sites, explains his best practices for performance, and is a bestseller. Steve is the creator of YSlow, the performance analysis extension to Firebug. He always shares best practices, for example, 14 Rules for Faster-Loading Web Sites, and the very informative State of Performance featuring his predictions for web performance in 2009. [more inside]