Based on Simon Willison's original 2005 eTech talk, Simon expands this into a full article covering the expressive functionality of JavaScript. He covers the basics of JavaScript: literals, variables, functions, scope, control flow, objects, classes, inner functions and closures. Everything a developer needs to know before diving into more advanced JavaScript.
David Dorward compares dot notation and square bracket notation, where square bracket notation can be used where dot notation can't. Recommends using dot notation, because its easier to read, and square bracket notation when it can't be done with dot notation.
Douglas Crockford's presentation on Advanced JavaScript. He covers topics such as inheritance, modules, debugging, efficiency and JSON.