Adobe PDF Guide and Tutorial

The Digital Inspiration Blog has posted a handy
Adobe PDF Guide and Tutorial that tells you
how to do such things as: merge two or more PDF
files into one; create a single PDF package by merging
files of different formats; directly save a web page as PDF
without having to save that page as an HTML file first, and;
convert PDF files into other formats like Word documents,
images, HTML web pages, etc.