Rob Pincus explains the advantages of a muzzle low ready position, especially in an extreme close quarters situation. The low ready position allows for more efficiency and consistency when moving into a shooting position and for dramatically more control if your rifle is ever grabbed by an attacker.
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.
Rob Pincus discusses zeroing your home defense long gun optic and why the normal rules of The Plausibility Principle are trumped by the efficiency of zeroing your rifle for much further distances than you would most likely be using it.