The PieCrust cookbook

General

Introduction
The 5 minute setup
The PieCrust cookbook
Website structure
Site configuration

Editing

Creating a page
Creating a blog post
- Categories and tags
Blog archives
Creating an RSS/Atom feed
Page layouts
Editing templates

Template engines
Twig 101
Twig extensions

Plugins

PieCrust plugins
Installing a plugin

Advanced

Pretty URLs
Multi-blog sites
Caching
Debugging

Chef

Overview
Baking the site
- File processors
Serving the site
Importing content

Miscellaneous

Limitations and workarounds
Alternatives

If you prefer to learn stuff by example, Ludovic Chabant, author of PieCrust, maintains a series of tutorials and tips aptly named the PieCrust cookbook.