azmark, I have an old trick we use. If you have a shooting partner, have him load the gun, only your partner loads it sometimes, and sometimes not. You will not know if it is loaded. Do this randomly. It makes flinching look silly, and it can be cured.
Dry fire, shoot a .22, AND shoot your rifle to work on fundamentals and field positions. Any schlub can hold relatively still on a bench with sand bags ...... learn to use what you'll have in the field: at best, a military style sling in the prone, at worst, you'll have to stand on your own two feet ......
Appleseed is great. Do that.
The single greatest thing I did to improve my shooting was to learn to handload, which made it possible to shoot hundreds of rounds of centerfire every year instead of a couple dozen .......