Too many people believe information is power....WRONG! It is the sharing of information that brings the power. If people struggle to get information from you they will just not come to you. People rarely get fired for over communciating!
This week try and introduce yourself to someone new, ask them about their role. Look for ways of helping them, and sharing information. Pick up the phone instead of e-mailing, visit people. Make sure the service you provide in the company is personal.