I agree with moebow. Make sure you get back tension. You don't want to get that final squeeze by using your string arm elbow. It should feel like you are trying to touch your two shoulder blades together... just a bit. Also, once you achieve the back tension, give yourself about a half-second pause to let your bow arm settle on target. You are shooting way too fast.It will make a world of difference for you. You won't be able to tell by yourself... you will have to film this or have somebody watch you. When you are at anchor, your string arm forearm should be level and in line with your drawn arrow... both horizontally and vertically. This will also save wear and tear on your shoulders and arms ( and possibly fingers) if everything is aligned properly. The exercise that moebow suggests works wonders and will give you a good feel for a clean release, as-well-as back tension.
Find a tree, post, or building corner and stand with it over your string shoulder behind you. When you draw and anchor, make sure your string elbow touches the tree, corner, or post and apply a little pressure. You will likely be off the first couple of shots like this because you will be focusing your attention behind you, but after that it will feel pretty good to you. You will get a feel of what a clean release should feel like as well as back tension. I still use this method for a tune up every now and then.
That string arm elbow needs to be behind you in line with your arrow. Try saying to yourself as you shoot: "draw, anchor, back tension (or squeeze), pause. Your release should become automatic when your brain senses that your bow arm is where it needs to be... remember, give it about half a second pause after you achieve back tension. If you make the release a step, you may risk anticipating the release and plucking or collapsing the shot. Happy shooting,
Rick