Take broadside and quartering-away angles only. A heavy, high-FOC arrow with a sharp two-blade head passes through both lungs on those angles from a modest bow, and a pass-through is what gives you a blood trail on the ground where you can follow it.
Because arrow flight is slow, an alert animal can drop below the shot. Shoot at relaxed, unaware animals and aim slightly lower than your instinct says on anything that already knows something is wrong. If it is looking at you, wait or let it go.
Pick a single hair, not the animal. Then hold the bow arm on target through the release and watch the arrow the whole way in — the entry point and the sound tell you almost everything about how to plan the recovery.
After the shot, wait. Thirty minutes on a good double-lung, several hours on anything ambiguous, and mark your position and the animal's exit line before you move a step.