When I do that, it is usually lack of back tension. I work on that by coming to anchor then thinking, "Back tension," rather than release. If I let the back tension build until the arrow just leaves, I am very accurate. I find that I am kind of surprised when the arrow leaves the bow when I do this, which is a good thing.
I also started practicing with a light draw weight bow, which really shows you the errors quickly. My shooting has improved considerably and quickly.
Here are the things I have discovered over the years (BTW - I shoot right handed):
Plucking the string = high right/right
Low back tension = left/low left
Anchor too low = high centered
Dropping bow arm/poor follow through = scattered
Not focusing on a spot = high
I'm probably missing some, but these are my most common issues. Hope this helps.
Some days I combine two or more of these.
Then I just go back in the house and try again later or the next day. I start up close (10 yards max.) when I restart. I concentrate on form, not accuracy. Surprisingly, the accuracy shows up when I do this. Then I move back a couple steps at a time. If I'm really struggling, I shoot only one arrow (rarely). Usually I use three arrows. As Byron Ferguson says, it is hard to concentrate for more shots than that. Once the arrows start to cooperate, I will vary the distance with each shot from 7 to 25 yards.
This is what works for me...usually. :rolleyes: