Use a 3-D target and don't worry about the scoring rings, shoot for a kill.
That's a piece of excellent advise. Try to block the ringsout of you mind entirely. Remember the best area to hit is just behind the fold of the leg (total broadside) and 2/3rds down the body, not 1/2.
FWIW, I really don't believe in the gray area above the lungs and under the spine although there are those who swear by it.I'm sure that is a whole nother topic though. Youmay be very surprizedby howlow the spine actually is from the top of the deer.IMO, you may have hit just above the spine.
Oh, and don't put the bow down because of this! If it disturbs you enough not to hunt the rest of the season, then that's your call and it is understandable, but use this time and determination to practice. Hey, you don't even have to hunt if you don't want to, but don't put the bow down for good because of it. Everyone makes mistakes.