I’m a big fan of The Office, and this short snippet really stood out to me the first time I saw it. In my life I personally prefer the “positive” of this, as opposed to the negative. “Do what <X> would do”. WWJD is kind of close to the mark (what would Jesus do) but I can see that going hilariously wrong — Jesus would walk everywhere, so so will I.
But I’d be happy with “Do what a child of God would do.”