I break my practice sessions up into two parts.....FORM practice....and "pick a spot" practice.
My form practice most of the time is spent shooting at a regular bullseye at close range. I'm not really focusing on aiming at this point, but more on my form. Sometimes I will close my eyes, draw my bow, and as I do that I visualize the part of my form that I'm working on....back muscles, arm, draw hand, etc. Sometimes I will draw the bow, and then SLOWLY let it down, while focusing on my form. After a half dozen times or so of this then I will loose an arrow.
The I go to my regular shooting practice, or "pick a spot", as I call it. I shoot a recurve instinctively, and I do NOT want to have to think of ANY part of my form or shooting mechanics once I start to focus on a spot. My concentration has to be 100% on the molecule of the spot I want to hit. ANY archer should have his/her form down pat anyway regardless of which aiming method they use.
That said, I do recommend that once your form is solid, then shooting at an animal shaped target will help you for hunting. A 3-D target is the best, because it will make you aware of the penetration angles, and also the fact that it, like a deer, is 3 dimensional.
I also love to shoot Judo points in my yard,as then I can shoot at almost anything and not lose an arrow. "Picking a spot" on a weed head gently moving in the breeze will DEFINATELY make you concentrate!
Offer No Apologies.....
NRA Endowment Life Member