Communication is the cornerstone of any community, including those at work. You might be surprised to learn just how bad teams across the country are at communicating amongst themselves and in the workplace.
Poor communication choices are also a problem, especially when differing personalities are thrown together; opposing opinions can turn into arguments, passive aggressive comments fester and build walls, and those with some of the best ideas are too scared of rocking the boat to pipe up.
Lead by example and show those around you how workplace communication should be. Say things openly, honestly and fairly in meetings. Greet those you see in the hallway. Make an effort to speak face to face, or at least on the phone, as well as via email. These little things go a long way for opening up communication channels.