One of the most frustrating things I’ve encountered when trying to help shooters (military, law enforcement, and civilian/private gun owners alike) is that it wouldn’t take much effort to make a marked improvement.

My advice to LE students at the academy I instructed for was a simple dry practice routine:
Five careful “shots”
Five presentations from the duty holster

Do this in the locker/ready room at the start and end of each shift. The officers were gearing up/down and checking equipment anyway, so adding this only takes a minute or two. However, even for those skipping half the sessions would end up with well over a thousand quality “shots” and presentation reps before the end of their rookie year taking no real amount of time and costing nothing.

Everybody that bothered to do it reported their next qualification went notably better with a much improved score. Amazingly enough…

I refer to this as the dental hygiene level of effort. Dedicate about the same amount of time it takes to brush and floss your teeth every day to learning a new skill can yield long-term results.

The big problem was how few bothered to do so.