We all know the answer, we will quit making mistakes when they slam the lid on the box and start shoveling dirt.
However, here is a real way to reduce them. Plan further ahead. If you plan three balls now start planning four. When that is your comfort level add another ball until you are planning the whole rack before your first shot.
Since I had a plan I never had to think between shots or never forgot to think. If I got out of shape, it only took a moment to get a new plan. We really can see the whole run within seconds but it is an acquired skill. Work on it one ball at a time. Chess helps too, great mental exercise. One of those furrin guys that plays pretty good plays a lot of chess too.
Hu