Stay dry camping.
This is the best rain tarp design I have found in my years of camping.
Step 1: Tarp Design
The main concept of this tarp design is to have a tight support rope under the tarp between opposite corners. The tarp needs to be attached to the center support rope but it should not be pulling on the tarp when the center support rope is pulled tight. This is done by tying a 1 foot loops in the rope where the tarp corners will be. The loops are tied through the corner grommets and adjusted for tension. The center support rope should be tied tight at 10 - 12 feet above the ground to give you plenty of head room. The other two hanging corners can then be tied with ropes and pulled out. The corner ropes should be lower than the center rope and tied with little tension.