In addition to using PDFs for final print and Web output, PDF and Acrobat are excellent proofing tools, as well.
Free Adobe Acrobat Tutorials
With Acrobat Pro you have the ability to print everything from simple composite RGB to your desktop inkjet to full color-separated, commercial print documents with printer marks.
You can use PDF documents as small, flexible, Internet-safe files for managing documents in a collaborative project that requires input from several people.
RC covers the use of Acrobat’s Article tool.
Use Adobe Acrobat 0 to combine documents and images from a variety of sources into a single, editable, searchable, compressed PDF portfolio.
An in-depth look at how to create and customize Acrobat 9 preflight profiles within Acrobat 9.
In addition to providing integration between all the Creative Suite applications, Adobe Bridge also gives an array of tools and methods for opening, viewing, and even creating PDF documents.
Geoff Blake goes over managing comments in Acrobat.