Always keep one with me in the woods.
If wearing it aound your head or neck, fold in a triangle and point corner to one side, not to your back. Not a rule, but I find it more useful.
Sling over your shoulder as a forraging bag, can be useful poacher's pocket, tie to a stick Dick Whittington style. Wrap your kit in it and sling around your back. Even tie around your waist as a hernia belt? Soooo useful.
I even wash mine in Nikwax. Don't know if it really makes a difference, but I figure why not? Probably not the best thing to do if you want to use it as a towel or water filter.
Best thing to do is keep it with you and play with it.