RE: How much is too much???
In the off season I shoot every other week approx 100-150 arrows.
Just before season I will shoot once a week approx 100-150 arrows.
During the season, I will shoot 6 times a day when I hunt. Not at dear (usually) but at a target when I break for lunch or dinner. This not only keeps my form but also keeps my mind from entering into dissapointment.
Just don't wear yourself out to the point where your form suffers. Everybody is different and I believe you need to test yourself to know your limits.
I live in an apartment in Baltimore so the luxury of shooting is often costly and very time consumingbecause of the travel time. That is why I shoot how I shoot.