Here's a finer point of shooting form that often gets missed: is your chin level at full draw? Take a couple shots and have a buddy watch you draw and shoot. If you have to move around to find your peep site or if your chin isn't level at full draw … it's time to move that peep site or evaluate the overall fit of your bow.
If you want to consistently shoot tight groups, you have to practice repeatable form, and that includes your noggin.
--Larry Wise has competed and coached archery at the professional level for decades. He's a retired high-school math teacher and a bowhunting fanatic.