At Intertech, we improve communication in the leadership team through personality cheat sheets, which are personality profiles that remind us who hates long-winded descriptions and who struggles to make a decision that involves something unpleasant. This is to keep us from driving each other crazy in those little annoying everyday ways that creep up when people work closely together for a long time. The cheat sheets are the result of a personality inventory similar to a Myers–Briggs test. I highly recommend it for any group of partners or managers who work closely together.
Also, we are intentional about building strong, trusting relationships among the leadership team. Pre-COVID, a weekly lunch at a local restaurant took us away from the daily press of business and helped us reconnect on a more fundamental level.