Here is a list of useful links to help you get started with HTML, CSS and other web “things”.

W3C Schools HTML Tutorial
From the people who created HTML, this is the best place to start.

W3C Schools CSS Tutorial
Another W3C tutorial, also the best place to start with CSS.

CSS Zen Garden
Learn about the beauty of CSS.

PHP.net
The official website of the programming language PHP.

W3C Schools PHP Tutorial
If you want to get your hands dirty in The Secretary code or PHP in general, start reading here.

PHP.net Intro
Another good place to start with PHP.

jQuery
Possibly the best JavaScript library out there. It lets you add great JavaScript interactivity to your page without truly writing JavaScript. It is also the official JS library of The Secretary.