My favorite tutorial is this one, where he turns a US Priority Mail envelope into a stuff sack. Pretty cool--turns out the envelopes are made of Tyvek, a fairly durable, lightweight material that ultralightweight backpackers often use. Basically a free project if you have one of the envelopes kicking around.
Pig Monkey's focus is on backpacking/wilderness survival vs. end of the world survival, but there's still some good stuff and things that I had not seen before. He's got great pictures, too! Thought I would pass this on.
