For whatever reason, my parents never explicitly taught me how to floss. Now that my mother is elderly and needs help, I had the opportunity to observe her floss, and she did the most bizarre thing.
Rather than cut off a long length of floss before flossing, she held the container of floss in one hand and then flossed using only the little bit of floss needed at the time, kept pulling it out as she needed more, and then cut off the floss after flossing.
I couldn't decide if she was crazy or a genius, so I tried it myself. I still ended up using about the same amount of floss, but I think her method would be superior in the case where the floss broke during flossing. Otherwise, it's more of a hassle, so I don't do it. But I think if I was just used to flossing that way, it would have no downsides.