At this point the only one that matters is the first shot! If it takes you 4 or 5 shots to get warmed up you're not ready to hunt. I like one shot practice sessions. Get all your hunting clothes on, climb into the treestand in your back yard, sit still for a while, then shoot ONE arrow (with broadhead) at your 3d target at an unkown distance. You only get one shot when you're hunting - you should practice that way ( of course I'm assuming you have consistent form. If you don't have consistent form this type of practice is not for you).

When you can hit the vitals under these "one shot" conditions with at least 95 percent success you are ready to hunt.