How many shots do you take in a typical practice session?? I think I taking way too many since by the end of a session I feel like I couldn't hit the broad side of a barn.

I'm currently shooting approximately 200-300 arrows per week in my quest to improve my accuracy. I'm trying to incorporate Byron Ferguson's techniques from his book "Become the Arrow". My sessions start out great for the first 30-40 shots (good placement, groupings, etc.). But after that my shots start to fall apart, which leads to more bad shots in a quest to figure out why my shots are starting to fall apart. It's probably because my arms are starting to become tired and I'm probably answering my own question, but I could use some advice being a greenhorn and all.

So back to the original question, how many shots do you take in a typical practice session??