I don't know why anyone would want to do this. Just roll it into a ball and call it a day.

You got that right, Halibutboy!

I wasn't sure why I clicked on this one...I know now that it explains one of the great mysteries of the universe. That it is possible to get a square out of this... IF you are an expert in origami. I roll it into a ball and stuff it under the flat sheet in the pile in my closet. That way, if I tap down on the flat sheet, the ball squashes down, presenting the illusion I have folded correctly without any of the trouble. I only have two sets anyway. 

Whatever takes the least time and doesn't look bad is probably sufficient.