A simple coiling method to keep cord untangled until you need them. I learned this at Outward Bound. Firm Cord works best. I like to use 2mm cord on the most used tie outs and carry a bit of 1mm cord for long reaches to distant anchors.
Starting at the bitter end, coil around hand leaving a foot or two between the hand and tarp attachment point.
Wrap the remaining cord tightly around the first coil and then pass a loop, close to the tarp attach point, through one end of the now figure eight shape of the coil.
Loop this over the other end of the figure eight and pull. Reverse process when you need to use the cord to tie up your tarp/tent.