Anything from shouting that you’re armed and will fire if they enter.
So, give up your position and element of surprise letting them know where exactly you are.
Leaving the home if you’re able too.
Just give them the house, Morrowind rules.
Warning shot.
A) Illegal and B) because it endangers bystanders and is reckless and irresponsible.
“Sorry I shot your grandma, I was trying to figure out if the dude making forcible entry to my home was an actual threat or was just out of Double Stuffed Oreos and the store was closed.”
No, if you shoot, you do so because you need to stop the threat, you want those bullets to hit the threat and preferably stay in him, not zip out and endanger bystanders, nor miss purposefully endangering them more. Your advice here is not only illegal but dangerous and irresponsible, and nobody should follow it.
Visually confirming what you’re killing.
You mean like seeing an arm break a window and reach for a doorknob?