The manual is amazing too. Especially good is the author's sense of humor and the design primer in chapter 7. For anybody wanting to get started I would recommend taking a look at the tutorials.
For anyone that is staring at "VII: Utilities" and wondering where the design primer is, I think the above comment is referring to "Part I: Tutorials and Guidelines, Section 7: Guidelines on Graphics." The section begins on page 91 of the linked document.