Get people recognize with each other. Conduct exercises and hold team days so that all members feel comfortable approaching with each other. Create specific projects that depend on teamwork and allow people to form teams to tackle the problem together. Publish teams and successful teamwork. When a team forms, provide the resources it needs and let everyone know how the team is progressing. A successful team requires that each member feels like a valuable part of the team. Make eye contact and speak with all people present, not just the more vocal or comfortable members. Also, do follow-up with different members of the team to make sure that they're happy and to get ideas from them on how to improve teamwork within the group members.