Cleaning out the closets (again) and other areas I haven't cleaned since before the second mouse visitation.
I'm bracing myself for something to come scurrying out at me. I just have to do it and get it done! 
Just stomp them.
When I worked on my college friend's father's apple farm, we went after the mice in our workboots. They are destructive in orchards and can kill a bunch of trees in a single season by eating the bark. So we were pulling brush and the others showed me how to get them - basically you run after them and stomp them.
Years later I was in my colleague's office at Hunter College in NYC and a mouse ran out from somewhere. I was standing in front of the desk. Without thinking, I ran after it and stomped it. My colleague - a big black guy - was traumatized. He said in a high pitched voice, "Why did you do that?" It was force of habit. Here I go barefoot and the mice pretty much stay away from my feet.
