Wow! What a question! There are whole chapters in books devoted to follow through.

Well, I don' t know if it' s ' proper' follow through, but when I release, I continue aiming until the arrow hits the target. My release hand slides back along my face a couple of inches and stays there until the arrow hits the target. In other words, I try not to move at all until the arrow is sticking where I aimed it. The bow will move slightly, my release hand will move slightly, but that' s the result of recoil and back tension.