Nova [QUOTE= I could never do that.
I can make it, almost every time. For only horizontal balance I can share my experience.
Through some practice, I’ve realized that the difficulty of making the balance comes from the human nature. You need to go against it when seeking front-to-back balance at the water surface. At the beginning, you are lengthening whole your body like a stick, with your arms and legs straight. Besides of having proper head position, you need to bring your hip up (down your belly), then your leg up. The water will help you float horizontally.(Now, your body is still hard). After your balance is made by the water, relax all “parts” of your body without compromising the position you already have too much. Then you will float with no motion.
This method can work for me, I hope it can work for you.