Jeremy,
Get up to 5 yards from the target. As you begin to draw, close your eyes and concintrate on your form,ie anchor,smooth release. Do this over and over until it is ingrained in your subconcious. Move back a few yards, do not focus on a spot just center of target and again concentrate on hitting anchor and a smooth release, do this over and over.
Once you have done this numerous times then begin picking a spot and shooting, but always concitrate on your form.
Shoot one or two arrows at a time. If you are tired stop shooting and rest a while.
I still do this to this day and I have been shooting for over 40 years. If I have a bad day I move close and work on form. If I get tired I stop shooting.
Danny