Consistency in your grip and presentation are essential. Rob Pincus shows how to establish a good grip on holstered firearm and how to correctly present the firearm and re-holster it. A Personal Defense Network (PDN) original video.
Instructor Don Edwards discusses and demonstrates the differences between shooting with a bipod and shooting from an improvised rest. Both methods can dramatically increase deviation control, but the improvised rest techniques are much more versatile and universal.