Regardless of where you are on your professional journey, the right peer group can become your greatest laboratory for growth. In my experience, transformation comes when people treat their peer groups like a lab, not a social club. In the spirit of creating one of these priceless labs for yourself, here are the seven biggest lessons I’ve learned about making peer groups work. Peer groups live and die on trust. Great peer groups are engineered to take advantage of the law of the instrument.