Accuracy
The changes that I made to improve my accuracy for my tight table besides lots of practice were mainly stance, grip, and set-up.
Stance
I adopted a more open hipped, bent knee stance, with my weight centered more back over my feet. There is very little weight on my bridge hand and my head is back on the cue. My hips and feet were more in line with my shots before, and this was not a stable position. I was set up maybe 30 degrees open to the shot with straighter legs and now I'm probably more like 45 degrees with bent knees.
When I'm set up to the cue ball, I can easily do squats from this position, so it is very stable. This does three things I like. One, it gives me a great long view of the cue to help sight the aim. Two, it helps keep my head steady over the shot. Mainly I don't want lateral sway of my head - more on that in a moment. Three, it keeps my hips and torso out of the way of my stroke and gives me free, uninhibited arm motion.
If your head sways it takes your whole body with it and throws the shot off. The stance should feel very, very natural, stable and comfortable. If someone came up and shoved you, you would not fall over.
Grip
The grip change I made was to change from a finger cradle grip to more in the palm and firmer. I have taken the play out of my grip. This gives you a lot more control of the cue, mainly the tip. There is no looseness in my grip or bridge.
Set-up
On shots without english, it's really important to set up to the cue ball center line by sighting down the line of aim, then setting up to that line. Mainly, I want to find and stay with the center on the line of aim as I'm setting up. It's easier to do this by sight, standing up with a lot of room between me and the cue ball. I hope people understand exactly what I'm saying. If you don't get down on the right line and fidget around with everything, your stance, bridge, hips, feet, shoulders will get all twisted and you'll put a crappy stroke on the ball. Get down on the line of aim, then fine tune it. Mainly, I don't shoot until I'm on the line of aim.
If I'm using side spin, what I do is to have a very good idea of what spin I am going to put on the ball as i'm standing up looking at the shot. That's the only way I can "see" the line for set-up. I set up to whatever adjusted aim I have with the spin. Funny thing about a good set-up with side spin shots is you seem to catch a lot of the cueball on a spin shot so you don't have to hit way off to the side to get action.
The last thing is really important. I aim center pocket and try to not wobble balls. I try hard to hit every single shot clean. This just takes the sloppiness out of my game and makes me a better player because I am basically practicing on every shot. They don't all come off that way, of course, but trying to hit center pocket helps make me a better player. You can get to the point where you can control the object ball amazingly well. The improved accuracy gives you a lot better cue ball too.
Anyway, that's it.
Chris