I've been know to be a bit slow on the uptake in addition to being genuinely ADD. This might not be a revelation for most of you, but it is a big deal for me. I have, after about four years, just gotten to the point where I know that the arrow is going exactly where I look. No matter how you do it that takes a lot of practice, but for me it had to happen in a certain way.
I just can't focus for very long on the same target, or for a lot of arrows. I need to shoot in groups of 3 or 4 arrows, 4 to 5 groups and then STOP. The do the same again later in the day, at least 3 times a day. On weekends, 5-6 times.
Quality over quantity.