After a few tries, it will become obvious which skills the operator needs to work on and over which he has gained a certain degree of mastery.
I don't devote nearly enough time to speed loads or weak-hand practice and probably should.
On the range, it is common to use both hands in firing. However, I am seeing a greater need for one-hand firing skills, especially in the context of building searches, close-quarters situations, crowded areas, the need to switch weapons, etc. In fact, half the shooting histories I collect concern one-handed shooting. Many officers develop the habit, in the field, of holding a flashlight in one hand and a gun in the other.
But each situation is different and personal scenarios are just that-personal. For instance, urban and rural officers have different needs and this should be reflected in training. Urban officers often spend more time patrolling neighborhoods in police cars and need to know how to draw a weapon and fire from a car if necessary. Rural officers may be faced more often with long-range types of situations and also must know how to cover themselves for longer periods of time as help is often farther away.
In any case, here is a sample of a good, general practice session that could be beneficial to anyone: