Zak123-

You asked if you focus on the target, is this wrong. No it is not wrong at all. As you can tell from all the different answers here, there is no "right" answer.

I will say that for me and the competitive shooters I shoot with, we all use the focus on the site pin method. I am sure in my case it is a result of years of shooting competitions with rifles and pistols as well as archery.

I'll say this, if your goal is to shoot 3" groups at 20 yards any method with practice should get you to this goal. If you would like to get to the point where you can not shoot 2 arrows at the same point because you know at best you'll be gluing on a new fletching, at worst you'll be ripping apart a robin hood, then I would suggest trying the focus on pin method. I question why anyone who focuses on the target would bother with a rear peep, as it becomes useless unless you are focusing on centering the front site in it with each shot. I think many people use it as an adhoc form adjuster .. when it really works great for what it was designed for, a rear site aperture.