Are you in a stand/blind? spot and stalk is less likely to get a kill. I prefer deer blind or tree/ladder/climber stand. Ive popped a couple out of the climber and most others out of blind or popup blind.
Just remember move as little as possible and when you get a deer in range draw when the deer's line of sight is blocked by a tree. Once you are at full draw you can make loud MEEEH to get it stop broadside is best, or quartering away. If broadside shoot just above the elbow. If quartering away aim towards the opposite front leg and take a deep breath slowly squeeze the release.
Good luck and happy hunting!