You have to cut out the guesswork, which means a ruler and a calculator for every approach shot and putt over 3 ft or so.
When it comes to 50-175 -yard iron shots, if you do not consistently choose the correct distance and aim, i.e. a distance and aim that is within 2 yards of the pin (minus the deviations due to imprecision and a perhaps slightly missed aim click,) then you will never be a top player.
We do not hit 15 yards short or 15 yards long, our pitches do not go 10 yards past the hole or come up short, still in the rough, and our putts do not come up short more than 0.5% of the time or scream 5-15 ft past the hole (though sometimes it is all but inevitable that a putt going 5-8 ft past the hole will happen due to extremely fast greens and a hard break.)
There are no "hit it over the trees... you'll make it" tricks (well, maybe one or two.) We just take every shot seriously and make sure that it will almost assuredly go exactly where we want it to go.