This morning I find somewhat complex to concentrate in my breathing. The neighbor was working on his flat and noises keep coming and going, hammering, drilling, demolitions you name it...
After trying to fight it, I remenbered Jundo about not fighting the crowd, but go with the flow (we were talking about annoying crowds moving in a concert) so I decided to turn those noises into my source of meditation. To my own surprise after some minutes my breathing came naturally to my mind, and there I was fully concentrated on my breathing, and didn't pay attention to the background noises. They returned by the end of the zazen session, but it was great, nevertheless.