To the right is a scan of one of the pages from a fine book called
"Basic Essentials: Backpacking" by Harry Roberts (ISBN: 0-7627-0476-4).
It's only $8 or so, and is a good primer on things like how to pack,
what to bring, how to select shoes, the differences between external and
internal frame backpacks... you get the idea. I'd recommend
checking out a copy.