Another way of looking at it (credit I think should go to that Upscale One Pocket book):
Try to do 2 things with every shot. If you succeed in just one of them, it was a useful shot.
If you do both things, it was like getting an extra turn for free.
Essentially that means every shot should combine offense and defense.
Bank a ball away from the opponent's hole and towards yours.
Knock a ball uptable and out of play for them, while leaving them stuck to the foot rail.
Smack ball A into ball B so that both of them clear away from the opponent's hole.
Bank a ball to your side and freeze the CB and use the rack to block their ability to knock it away again.
If I could name one "Bread and butter" one pocket move, it might be this one.
You knock the loose ball nearest their hole away, and follow to stick the CB on the end rail.
If they already stuck you on the rail the same way, situations come up where you must elevate a bit
with draw to get the cue ball back down towards the rail, which needs some touch.
Any any case, the idea is get the CB moving on an angle moving into the rail, which gives you
a good chance of freezing them on it even if your speed isn't perfect.