For an example of why you should WAIT, WAIT, WAIT:

I shot a nice 10-point in 2002 from about 8 yards broadside, hit him about half way up right through both lungs. I got down, went and had breakfast, came back, trailed with my dad (I am colorblind and can't trail blood) for about 600-700 yards, came up on the buck lying there in the weeds and I thought he was dead. I patted his rump and then I noticed he was still breathing. I loaded another arrow and took a step to get a better angle to shoot him again and he jumped up and ran another few hundred yards! I waited there another 30 minutes with my dad as we stared in disbelief. I then started to stalk up to the brush pile he had run towards, but again I was sure he must be dead now since he was so close to death before that helet me pat his rear before. I got about 20 yards from him and BOOM, he runs off again and we watch him run another 500 yards into another small wood lot. We decided to just wait a few hours this time (finally wised up). Found him after six hours and he had just died because he was still completely limp when we found him. I kid you not, this deer was shot through both lungs!!! Now obviously this was a fluke, but it instilled in me the point that I should always wait longer than I think I should.