If I can't runout, with each visit to the table, I work toward being able to runout, while at the same time keeping control of the table.
If the table is open, I first look for a runout. If no runout with either set of balls likely, I look for the group of balls which is blocking the other set somewhere or is blocking the 8. This is the group I want. The group that is blocking the other set of balls.
Then I shoot in one of those balls or if I don't have a shot on one of those balls, play safe (leave my opponent with no shot) or try to leave my opponent with a shot on the other set of balls.
Now I have my set of balls. I now work toward being able to runout. At the same time, I also work toward blocking more of my opponent's balls. I look at my trouble balls. These are balls which are blocked, clustered, or can't be made into a pocket.
I then think about where I can move one of those balls. Can I move one of those trouble balls in front of a pocket to block my opponent's balls or the 8? Can I shoot one of those balls into another trouble ball so they are both broken out? Can I shoot one of those balls into my opponent's balls creating problem balls for him? Can I fix a trouble ball and at the same time move that ball closer to a pocket and maybe even block that pocket?
The very best shot is (early on - most balls on table) to fix one or more trouble balls AND move a ball closer to a pocket AND block my opponent's shot(s) or 8 into that pocket AND leave the cue ball in a nasty place so my opponent has a difficult shot (or has an easy shot at one of his balls which is blocking my ball(s)).
Basically I am trying to gain advantage here. Re-arrange things so I have an easy runout or my opponent has an impossible runout. I do this right away. My thinking is that the more balls I leave on the table, the harder it will be for my opponent to runout.
So I want to leave most of my balls on the table until I can runout. I want my balls to be near pockets - preferably blocking my opponent's balls. I want to move trouble balls closer to corner pockets or in front of the side pockets.
So I start out by selecting the group of balls which is already blocking my opponent's balls or the 8. Then from the get go, I re-arrange things so my balls are closer to the pockets and blocking more of my opponent's balls.
Then my opponent shoots and pockets most of his balls (getting them out of my way - Thank you!). Then he gets down to his 1st blocked ball and has a bank shot. If he makes it, he then has a bank on the second blocked ball. If he makes it, good for him! Good shooting!
Many times they don't make the banks though. Then I have an easy runout or a BIG advantage. Balls all over the place, almost impossible for my opponent to leave me without a shot. But easy for me to leave him without a shot as he is down to one ball.
Sometimes (when having fun) I get to where I have 4 or 5 pockets blocked with my balls. My opponent looks this way - no shot! He looks that way - no shot! Looks another way - no shot! Then he looks at me and says some things which I will not repeat on this "family forum".
Anyway the bottom line is that your balls are soldiers which can be used to block your opponent's shots or block the 8 into a pocket. If you don't have a shot or can't runout, might as well fix a trouble ball and at the same time try to move it so it is blocking a pocket.