I've listed 25 different tarp shelter designs to help you get started. Each configuration has its pros and cons and there isn't really a perfect design for all occasions. You'll have to chose the right one depending on your situation or you could just try them all out to test your bushcraft tarp setup skills. Click the image for more info or go to http://rollingfox.com/how-to-make-a-tarp-tent-with-designs
One of the popular fabrics for making lightweight tarps and shelters is silicon-impregnate ripstop nylon—silnylon or ’sil’ for short. It is valued for its light weight, strength, and waterproofness (and relative low cost compared with other options).