Guys like Wind, Rowdy, M700 and others are far more the marksmen than I am but I will offer my two cents or so and you can make change if ya want.
Accurate rifle shooting starts with the fundamental premise that you are the weakest link. First, foremost, and almost always. What this means is, when bench (table, truck hood, side of tree, etc.) shooting for accuracy, or really any time, you want to eleviate as much of your influence on the gun as possible. Now, you can go a long ways with this and get gun vices and butt stock cushions and weighted sleds and all manner of things designed to make the rifle as steady as possible and thus reduce to varying degrees your influence on the shot. Any and all of these things may be to your liking and may suit your needs but that does not make them necessary. True, the more you you put into this the better you may perform or in some cases the longer you may be able to shoot but that doesn't mean you can't achieve satisfactory results without a lot of gear and expense.
A stable platform that offers comfortable natural seating is the starting point. Don't force yourself into an uncomfortable position to use a certain table or rest or whatever. If you're shooting at an established range this isn't usually an issue but if you're shooting at your own range as you say, make sure you put some thought into this.
A simple "U" or "V" shaped wooden front rest can do wonders. Since this is not going to be adjustable, be sure you get the height right to make things natural and comfortable. Whatever rest you decide on, pull it back so it is at least under the forearm of the gun.
From there, since I don't use any type of butt stock stablizer, I use my non-shooting arm to assist. I pull it back across my chest, with my elbow forward for stability and my hand on the bicep of my shooting arm, helping to support the stock. Might sound convoluted but when you sit down and play with it it will make sense. The idea being to form a solid position that reduces my influence on the gun (vs. my hand on the fore arm).
If you look close in this pic you can see my left arm tucked up under the gun:
Here's one of my oldest girl but note that she likes to use her hand to support the stock:
Once you are comfortable and as rock steady as possible it all comes back to what all shooting does, the fundamentals. No death grip with the shooting hand. In fact, the more stable you are, the less grip you need to apply and the less the grip the better the shot.
Proper finger placement on the trigger matters. Now I know there are those you can wrap their finger around a trigger to the last knuckle and do amazing things but by and large for the bulk of us, how you place your finger on the trigger will affect accuracy. About half to the end third of your pad is best. If you look at your finger prints and find the center loop that's an ideal place to put your finger on the trigger. This positioning helps reduce muscle strain and twitching.
I'm not a big fan of the term breath control. It's more breath awareness. Don't hold your breath. Just breathe, nice and relaxed. Ideally, your trigger breaks just as the last of your exhale is over but don't rush it or anticipate it. Slowly squeeze the trigger as you exhale and let it surprise you. Better to fire during exhale and missing that natural pause than to force the trigger. NEVER FORCE THE TRIGGER. This is why a heavy but crisp, repeatable trigger is still always better than a light but sloppy trigger. You want it to break clean the same way every time.
Now, all this is assuming you have proper sight picture and sight alignment if using irons or proper scope placement if using optics.
If it don't feel right, don't shoot. Shake it off - stretch, breathe, take a break if you need to, whatever, but never force the shot. Doing so just again makes you the big bad influence on accuracy and once that frustration ball gets rolling it is often nothing more than an act in futility.
I fire three shot groups. If sighting in, then I don't want the distance any more than 25yrds. Sighting in at 100 yrds is fool's folly. Do it up close and know you, the gun and the round are accurate, then adjust for distance. I will not make an adjustment of any kind until I have at least one three shot group. By group I mean something no more than say 1-2" in spread. I don't really know how long I wait between shots. I don't speed shoot them by any means but I don't get up and walk around between shots either. More often than not what I do is load one round at a time. The time it takes to unload the spent casing, load another round and get back into position is in my experience generally sufficient.
But, every rifle is different and you'll have to learn your guns. I remember one day at the range with Rowdy and I was shooting one of my guns and he was watching my shots through his spotting scope. I stopped to BS with him a bit about something and he said, now see if it that were me and my CB I wouldn't have stopped shooting. That gun appreantly likes to be shot rather quick and warm. He knows that from a lot of shooting and cyphering.
As to a fouled vs. clean bore, again this is going to come down to your gun but I suspect more guns prefer a fouled bore vs. a clean one. But, that doesn't mean I would foul a bore before hunting season and keep it that way. Hunting accuracy is a different quantifier than bench accuracy.
That kind of stuff is going to come to shooting time and knowing your gun and what you are and are not okay with.
Hope some of that helps.