A friend of mine was doing some origami the other day, and it got me thinking: could the principals of origami/paper folding be applied to tarp shelters? A quick Google search led me to http://www.equipped.com/tarp-shelters.htm
It not only provides a great summary of many common tarp shelter designs, but also shows several more complex shelters and structures for larger sized tarps(changing/shower room, bivvy bags, mountain pods, etc) . All designs provide numbered corners and support points, instructions for the folds, and a "final result". That said, most of the designs are pretty self explanatory. Many of these designs could be fun to try out while camping.
The simpler designs are mirrored here in a more readable format: http://www.bushwalking.org.au/FAQ/tarp/TarpShel.htm