From my perspective, there seems to be two sorts of archers, the ones who shoot very consistently and the ones who are just the opposite. A lot of it comes down to basic form and disipline. Good archers have a very rigid and consistent form. Their shoulders, bow arm and anchor lock into a rigid structure and it's always the same for every shot.
Then there are the more unfortunate archers, who have what I call a 'losey goosey' form. These archers don't seems to be able to reconstruct a solid and reproducable full draw structure. It seems their joints are too elastic for this. However, I've noticed that 'losey goosey' archers are often good on moving targets.
I fall under the losey goosey category. For me, consistancy is like trying to remain poised on a knife's edge, where I'm always prone to falling off. My slightest variation of form usually grows into a derpressing shooting slump, most times this happens well before the problem has been diagnosed.
Now, that I have seemed to be able to conquer my ongoing target panic problem, I thought the arrow shooting world was going to be my 'oyster', but no, new problems seem to materialise faster than I can remedy them.
Everything felt fine as I would come to full draw and release, but my arrow seemed to have developed a mind of its own. Some arrows would go straight to where I was looking, but most would go either high and to the right, or low and to the left.
I don't know why it took me so long to track down the problem, but when I finally did, it was apparent that I had developed a 'wandering bow arm'.
It might sound silly, but on reflection most archery related problems are equally obvious once diagnosed. My bow arm had developed a mind of its own. I'm sure we've all been guilty of dropping our bow arm now and then. This tends to happen when we're in a huge hurry to watch where our arrow is heading. It's a huge mistake as your arrow always goes low.
Back to my little problem, not only was I dropping my bow arm far more frequently than usual, I had developed a silly little 'flourish' of my bow arm wrist when releasing the arrow. Without even knowing it, I was flicking my wrist in a clockwise direction, as well and lifting my bow arm slightly. It was an unwanted addition to my shooting regime. It took me ages to realise that my 'high to the right' shots were a result of this. I already knew my low and to the left shots were a result of me dropping my bow arm.
What's the best way to ensure this doesn't happen to you? Well, its very simple really, you simply hold your bow arm nice and steady. The best way to do this is to always watch your arrows fly by continuing to watch the arrow's flight through the bow's sight window. Don't drop your bow arm (or do a flourish) until the arrow has impacted. If you do this, your bow arm must remain relatively stationary throughout the shot, as it should.
I doubt that I'm the only person who has had problems of this nature. Perhaps you are experiencing similar problems and you just don't realise it yet. If so, I hope this little bit of information will be helpful.
Mick
If you realise what the problem is and how you should rectify it, then it's just a temporary problem. It's still annoying though. 
