Use social proof

Grow Your Business with Bill Ringle: Use social proof to accelerate the sales cycle

What would you do if you had a choice between hiring Pat and Sam, equally qualified and equally nice people, except that Pat has a dozen testimonials from satisfied clients? Wouldn’t that sway you? That’s the power of social proof.
When other people say nice things about you and your work, it carries far more weight than if you say you do good work.