Listutorial takes you through the basics of building background image lists, rollover lists, nested lists and horizontal lists.
Tutorial 1. Background images for bullets
You can change list bullets to squares or circles, but a far better option is to use background images for bullets.
Tutorial 2. Rollover list
This tutorial explains how to achive rollover effects using CSS.
Tutorial 3. Nested lists
This tutorial explains how to apply CSS to nested lists.
Tutorial 4. Horizontal lists
This tutorial explains how to build horizontal lists using "display: inline".