Trust is probably the number one facilitator in people communication (after speaking the same language probably). With trust, people knows they can rely on what you commit to do. With trust, people knows what you are asking them to do is relevant to a project or team goals thus enabling them to do a great work. Below diagram is my compilation from the chapter about trust in Scott Berkun’s book: how to make things happen.
I already shared a diagram about making decisions, if you missed it you might want to have a look.