Handling virtual teams

Q. What is the best piece of advice you would give a manager of a virtual team (located in other cities)?
Many managers now have team members scattered geographically.They may have limited opportunities to meet in person. These teams may relay on social media, email, telephone conference calls, and web conferencing to meet. How can they avoid miscommunication, unclear expectations, and conflict? What is the best piece of advice you would give this manager? 

Try and make your performance management system as objective and transparent as possible. This will build trust across your team members, irrespective of geography. i.e. Your team members from other locations will not get insecure over your not being around them to appreciate their good work at all times. Every other team and people management principle is a technicality from this point on, i.e. once the foundation of trust is firmly in place.