I use hair ties, doubled over, in windy or stormy conditions. I loop it around the stake, then the guyline, back to the stake and plant it. I had one blow out in 20 years of doing it that way, but I think it was defective. In most cases, I pull the stake loose, first.
In mild or rainy conditions, I simply loop one loop into the other then anchor it down.
In either case, it helps a LOT with any stretch.