I shoot several ways that help translate my practice to the field.
1. Load testing and sight-in: I use as solid a rest as I can get. Every shot is controlled.
2. Field practice: I do this from the various positions I might end up in. I am cool and calm and just trying to figure out if a different position affects my POI and my grouping from them. I use shooting sticks, the side of my truck, the tail gate, off hand in various positions, and both with and without a sling.
3. Rapids/ follow-up: I go from carrying to shooting, or I make a quick follow up after the shot seeing how long it takes me to reacquire my target. I will also practice multiple targets here.
4. Stress shots: This one is the most missed by other shooters. To simulate the adrenaline rush of a black 'yote, or huge buck, I run about 100m then pick up my rifle/shotgun/bow (most common) and shoot. This may not be the perfect way, but your heart rate will be up, and you'd be surprised how much you shake.
I use these, but I generally don't go out and say "today is stress training." I usually make it a game (except for #1). Posting up clay pigeons and bottles to simulate targets smaller than my actual ones helps too. It makes a great show I figure when I run up grab my shotgun drop to the kneeling and bust a pigeon at 100yd (H&R UltraSlugger not a pump smooth bore). It has helped that I get allot of this training for free as a Marine too.
As far as how it relates? I can perform the above trick 50% of the time. However, I am the same from 200yds if I am calmly shooting from my tailgate. My AR 15 can bust out a 2"@200yds rested, but just me standing makes a clay safe at 100yds about half the time too. I consider my effective range while hunting based on the shot. 300-400yds when I am shooting my .257Roberts off sticks sitting with a clear view of the song dog about to receive my "blessing" is not a big deal. Make me twist around and lean out around a tree in a treestand with my muzzleloader and I am limited to 50yds.