Try first using your hands, i heard it can take up to 15 minutes to find it that way, and put pressure until you find the point in the neck that will make your vision go dark. I forgot which side is better but im sure its easy to google which takes blood in vs which takes blood out (side that takes blood in seems to be better, and will also prevent swelling of the head after) Use that point as a reference to figure out best position, seems as though side knots work best for that