Communication is the key to any successful team, but especially for a virtual one. You need to establish clear and frequent channels of communication with your team members, using a variety of tools and methods. For example, you can use email, phone, video conferencing, instant messaging, and project management software to share information, updates, feedback, and questions. You also need to communicate your vision, goals, expectations, and priorities to your team, and make sure they understand their roles and responsibilities. Communication should be regular, consistent, and transparent, and include both formal and informal interactions.