For a quick pee, "Hurry Up"
To get him to do numero 2, "Let it go"
Let it go comes from the fact that he seems to need to find the absolute perfect spot- he'll be in the number 2 position, and shuffle this way and that, up and down, until he finds that absolute perfect location. When he was little, and we had no yard, and he was on a leash, I'd get irritated after a minute or so of this, and say "C'mon, just let it go!"

Now "Let it go" will get a quicker number 2.
