-After reloading, picking up an empty magazine as soon as it hits the ground.
-Not letting an empty magazine fall free because you dont want to damage it.
-Failure to properly perform immediate action or remedial action for a malfunction/stoppage.
these actions (and other similar ones) occur when you have a mindset of "you're just at a range practicing". Mindset is key. You're there to train/practice for real shit.
That's what I see 99% of the fudds do at the static handgun range at my local club.
It's amusing to watch some repeatedly press a dead trigger on a pistol with the slide locked to the rear.