Practice a lot,know Your yardage and have lots of patients....make only good shots You know are going to be good clean kills.After shooting a Deer wait 30 minutes to an hour before tracking if You don't see the Deer go down?If You think You've made a bad hit and hit too far back or low gut shot wait even longer or back out quietly and search much later and get experienced help!
As mentioned wear a safety harness and enjoy the time out,some times Your Hunt can go quickly and other times it can take days before You have a Deer come even close enough for a shot!