In this article, published on methodsandtools.com, Dan Haywood introduces DDD principles and patterns. A good read if you are just starting out with DDD.
Read the article

Dan Haywood is a UK-based freelance consultant
specializing in enterprise application development using domain driven
design approaches and agile development. Dan is a committer and advocate of the Naked Objects framework, and
the author of “Domain Driven Design using Naked Objects”.