I started using Sass and Compass last summer. It has probably been the biggest thing to happen to my web development style since the transition from table-based to pure CSS layout. Just bought the book this week and am super stoked to read it.
Awesome Fontstacks helps create a bundle of matching, free web fonts with failsafe fallbacks, ready to drop into your CSS.
Antonio Carusone offers eight simple steps for improving your typography. It’s fairly standard for the most part, but he provides some good CSS examples for web developers.