Learn to trust your team and your team's trust in you - being able to trust your team ensures that you have confidence in your team and their deliverables. That goes both ways. Nothing is more toxic than having not having any trust.
Allow for change - The one constant in a project is that it changes or it evolves, some big and some small. So be prepare for it.
Open up the communication channels - Communication is usually key to the project's success. If there is a communication road block, lets open it and let the dialogue flow. A project manager is usually in the right position to do the opening.