I mostly use just the basic, inexpensive, flat, polyurethane-coated, ripstop nylon tarps with grommets around the edges. They are twice the weight of spinnaker cloth or silnylon, but they cost less than half as much, and they withstand stress and abusive treatment better.
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My favorite tarp is ripstop nylon that has been moddified by adding five reinforced nylon straps to the outside for tieing guy out lines. One is in the middle and the other four are evenly spaced between the center and the four corners. In addition to the five straps on the outside there is a reinforced holder for a pole on the inside at the center. The straps on the inside at the center are attached to the reinforcement for the out side center guy out.
This mod is very versitile and can be held up with or without a pole. It also came with grommets that are spaced about every foot. With this setup I can set up just about anywhere because I can addapt the tarp to many shapes and it can be used with trees or poles.
I leave two feet of paracord attached to each grommet, but I would like it a little longer, maybe three feet would be about right because it would be more versitle and easier to tie down. These are tied in the center of the two foot length of paracord so I only have one foot of length from each grommet. Eighteen inches would be better I think, but I haven't tried it. I just keep using it the way it is.
I also use paracord for the guyout lines on the top on the outside.
I can't take credit for this. I read about it in a book and I had the mod done at a military surplus store that also makes back packs and tent awnings.