The bow and arrow was a uniquely human invention that was reinvented again and again over the last 50,000 years or so, as were the ways to shoot this uniquely human invention. I'm sure if you look the world over, a million ways to shoot the bow have been invented. Some of these ways were no doubt reinventions of earlier methods, but since writing hadn't been invented for much of the 50,000 years, they count as new inventions.
My advice would be to use a method until you think you've learned all you can learn from it, and if you're happy with your skills, stay with it. If not, then look for another method, or at least look for changes to the method you're using. Remember, you're not trying to learn something that was invented for Martians. It was invented by humans for use by humans, so your own intuitions count for a lot.