Stewart Anderson is a doctor, who also just so happens to have have hiked the length of thePacific Crest Trail. Along the way, he began to think about all the injuries that can occur on such a hike and came up with the idea of creating the The Thru-Hiker's Medical Guide.
This helpful site has all kinds of great stuff to think about before you set out this Summer on the PCT or the AT. He covers things as simple as blisters on your feet (all too common on these hikes) to fractured bones, tendentious, and the dreaded "Hiker's Belly". This is definitely a good read for anyone planning a multi-day hike. There are some good tips and information that may make your trip a lot better.
Thanks to this one goes out to The Goat.