In no particular order, these external resources supplement the tutorial by providing shortcuts to commonly used information and further learning.Text Styling
Introduction to typography using CSS.
Higher level step through of some of the theories and concepts behind developing a website. Talks about topics like typography, color schemes, wire framing, information architecture, and plenty more.
'Cheat sheet' for developing CSS. Condenses most of the knowledge you need for developing CSS on one web page.
Takes a deep look at page structure in HTML and CSS from the perspective of user centered design. Great resource if you plan on developing a public facing website used by many users.