Ok, so I started getting to the range more and had a thought: Now what? I have been shooting for 3 decades but not really training.

How do I get better at shooting rifles? What training regimen? How to track if I am improving?
The range has 25, 50, 100, 200. What to do for AR? What to do for "precision" rifle?

I know we have some 3 gun and PRS gurus here. Can any of you recomend a regimen for the following:
+AR 20/30 rounds per session
+Bolt gun 10/20 rounds per session

Also any pointers to understanding density altitude and any other things that will help with bolt guns? I zeroed my rifle, now how do I get from holes on paper to sub 1moa at 200 yards first shot everytime?
I understand there is no shortcuts, but I don't think I even know where this trail starts.