Just trying to learn. I like to save the competition for the shooting line. I think there is a lot everyone could share and maybe it would help everyone shoot better. Its a lot easier to communicate and learn then to buy and try.
I will answer with what I think matters the most outside of equipment.
1) How you approach the rifle - Being the same position behind the rifle is important. Too much pressure anywhere on the rifle will cause a POI deviation. You should be able to duplicate this easily everytime. I like to get up from the practice rifle and sit back down to see how close I am. This is different for each person, find your spot.
2) Trigger discipline - learn how to pull the trigger. I know this sounds crazy but big errors happen here. You should lightly squeeze and follow through. You should then see the pellet/round travel to impact. If you are not seeing this you're doing it wrong. Dry firing is the most effective way to do this on a powder, air gun it is sending rounds.
3) Practice - Muscle memory, best practices, personal limits are all learned through doing. You do not need to shoot 100 yards to practice. I practice at 3 distances. 25 for fundamentals, 50 for wind calls, 100 for prep and final wind and rifle setups.
I have several setup to practice. I find my springer really helps me understand recoil mitigation and my Avenger is good for the traditional bolt guns. I am looking at a 270z for the bolt cycling. These are just my personal things.
I do think as with any sport your practice and training are going to be unique to you. You need to see where you struggle and then ask for help on that. It is easier to give tips on specific issues rather than a broad overview.
Hope that helps.