There is no secret to becoming a better bow hunter. PRACTICE!!!! Practice shooting your bow long range, short range, at angles, with your pack on, and in the wind. The more shots you take out of your bow the better your confidence in yourself and equipment will become.
Zac Griffith recommends shooting at 3D targets as often as possible. This will help you focus on aiming at animals instead of paper. Also push your limitations at the range. Shooting your bow at long-range consistently will increase your ability, confidence at short ranges, and amplify tuning issues with your equipment. NEVER practice or shoot your bow longer than you’re capable of!
Spend as much time at and support your local shop! These guys know what they’re doing and will teach you a ton about your equipment and form! I have learned 90% of my bow know-how from the awesome staff at MY LOCAL SHOP!