That's why a session of standing-up, hind-leg shooting of .22 handgun on a bullseye target once in a while is good.  We have no distractions and are forced to concentrate on those very basic elements--breath control, sight picture, and trigger manipulation.  Sometimes we think we're decades past thinking about that stuff, but really we're never past it because it's the foundation of all shooting, tactical and otherwise, and if we take a small amount of time every once in a while to do some basic shooting like that, we get closer to the source, as it were.

In the same way, sometimes doing some of the "advanced basics," like turning and shooting, a la Jarrett's box drill, or standard shooting-while-moving, is good stuff.  We may not think much about these things because we learned them a long time ago and actually teach them to others, but it's important to be able to perform them on command in their simplest format, for shooters we're teaching, and the benefit they give as refreshers is helpful as well, in my opinion.