Yes! Have tap cards and get them to leave reviews BEFORE you leave. After they inspect the work and they are excited and say something positive, say "that sounds like a good google review". They will always say they'll leave one. Then you say "I'll do you one better, grab your phone and tap this card. This is a link to our google page. If you mention my name, my boss actually gives me a bonus. I get an even bigger bonus if you include a picture. Would you mind doing this for me real quick?"
It works very very well.
Tap Tag Review Card with QR | Google, Trustpilot, TripAdvisor Reviews