Verified clear, with nobody else in the house. If anyone is home, use an inert training gun or empty hands instead. Walk your main hallway and stop short of each doorway. Practice seeing into the room a little at a time from back away from the frame, rather than stepping straight through. Ten doorways, slowly.
Twenty rounds at 7 yards on the squares: start at compressed ready, lean out as if around a door frame, press out, and fire two rounds per string.
You have been taught a method for this. Practice that method rather than inventing one.
You are not clearing a house. You are getting to your family or getting out.
A carbine is long in a hallway. Practice keeping the muzzle behind the door frame.
AUX (when ready): two hits from a lean in under two seconds.
Going through a doorway is the most dangerous step in a building. Take it only when you have to.
You will want to go through the door. Stop and look first.
Take in the room a slice at a time. You see more by going slower.
The only reason to go down the hallway is that someone you love is at the end of it.
Learn the angles in your own house now, in daylight, without any pressure.
Layer: run it at night with a handheld light.
Dry-fire: no ammunition in the room. Verify the firearm is clear — twice. Use a safe backstop. When you finish, say it out loud: “Dry fire is over.”
Non-negotiable. Every drill, every rep, every time. This applies to live fire and dry fire.