[abrigger]

Here goes.

1. If you can change the vertical height of you target easily, I would practice 2'-3' for deer and 3' for bigger game.

2. I shoot 20-40 yards regularly. I practice 50 yards about 50% of the time. I think people say not to bother with the 50 so you don't pick up a bad habit...which would be taking a 50yr shot at an animal when you are still learning to shoot.
I say get good to 40, and then start on 50.

3. A 5" - 6" spread for hunting is great. That would easily cover the vitals of a deer. But tighter is always better isn't it?

4. If I have time I will shoot singles so I do not tire out too fast. I think about my shots more and shoot more accurately. I shoot 2's & 3's less frequently. Never shot more than 3.

5. Shooting more than 1 broad head at a time is a bad idea. Not only can you damage your blade but you can damage your fletching.

6. Practice from different positions is a good thing. Make yourself uncomfortable and shoot the target. Shoot from knees and so on.

Hope that helps.